So, I've been using Playstation Vue for about a month now, and it looks like I'll be able to cut the cable and still have quality DVR capabilities for football.  I'll be saving quite a bit per month, but that is partly because I was paying for AT&T Uverse's U200 plan, which includes an awful lot of stuff that I never watched anyway.  I'm also paying for the AT&T equipment (DVR plus an extra receiver = $25), and that's an expense some people don't already have.  I'll try to include the basic costs for my setup so you can decide whether you would actually save money.

If all you want to do is watch live sports and not worry about DVR capabilities, then an antenna and either Sling TV or Playstation Vue are your best bet.   You will also need a streaming device -- Roku, Amazon FireTV, - although Playstation Vue is avalaible on Playstation and Sling is available on Xboxone.   I think SlingTV is available on AppleTV, but Playstation Vue is not.   The price for Sling Blue + Sports package is $35 per month, which is the same price as the middle tier Playstation Vue (the minimum level you need for all of the sports channels).  Neither system requires a full year contract, but Sling offers some discounts on streaming devices if you sign up for 3 months.  Playstation Vue offers more channels, while Sling offers a little more On Demand content.   And, of course, Playstation Vue offers the "cloud DVR".

For streaming devices, I really like the Roku because the user interface is just so simple and appealing.   However, as discussed more fully below, I recently picked up an Amazon Fire stick to use with a new Tivo device.  It turns out the Playstation Vue app for Amazon is MUCH better than the Roku version.  In addition, Tivo has a streaming app for Amazon, but not yet one for Roku.   I suspect the Roku apps will catch up over time, but for now the content providers are more interested in servicing Amazon than Roku.

The video quality for Playstation Vue is generally excellent.  The app will sort of test your internet connection and provide you the best quality video it can based on your internet speed.  Sometimes the video starts out a little fuzzy, and then clears up after a few seconds.   The audio is stereo only, same with SlingTV, but this may change in the future.   For most provider apps - like WatchESPN, AMC, FX apps - Playstation Vue is recognized as a cable provider enables you to use the direct apps.

You don't actually record shows with Playstation Vue.  Instead, Sony has a "cloud DVR", which essentially means they are saving a copy of every show on every channel.   The catch is, you have to select shows to "record" in advance, by selecting them for your "My Shows" folder.   But, you get every episode of whatever show you select.  I have  "NFL Football" saved on ESPN, and it saves every game, every "NFL Llive" "NFL countdown", etc., and even the NFL Films replays on ESPN classic.   So, saving shows is not hard, but they are only saved for 28 days.  (fortunately, I have a setup to burn shows to DVDs that I want to keep....they wont' be HD, but they will be saved for me to throw out later when I clean my garage).

At first I thought you had to wait until a show was over before you could watch it on the DVR, but I eventally found the control that lets you watch a recorded show form the beginning while it is still being recorded.   You might accidentally get a real time score update before the show resets to the beginning, but that's a small penalty.  This is huge, because I like to sort of compress my football watching by zipping through several games at once, including games that are still in progress.

The Playstation Vue App for Amazon really outclasses the app for Roku in the DVR playback.  With Roku, when you FF or rewind all you get is a time bar at the bottom, with no visual indication of where you are in the program.   You just have to estimate what you're looking for.   Skipping commercials is okay, but you cannot easily FF from the end of one play to the start of the next.   Also, whenever you skip material, the Roku video kind of "reloads" which adds another delay of 5 seconds or so.  

The app for Amazon Fire is much smoother.   When you fast forward, you don't get a fast moving video stream but you get still pictures showing you where you are in the show.   You can hit 2x or even 4x at the end of a play and then hit play again when the teams are at the line of scrimmage, and the video picks back up nearly instantaneously.  Skipping commercials is a breeze.  Very enjoyable.

But what about games that are not on cable, that you want to watch OTA?  For DVR capabilities, you will need a TiVo OTA reciever (there's a couple other brands out there, but not much comparison to TiVo)

I picked up a new TiVo Bolt from Best Buy for $200.   It has a 500GB DVR, as well as a bunch of apps (Netflix, Hulu, etc.), which are redundant when you already have a streaming device.    The Tivo Bolt streams its OTA content, though, without needing to buy the separate Tivo Stream device.   I can watch my Tivo DVR -- including live TV -- from here in my office.   I can watch a great picture on my phone, my tablet and my computer.  

You can connect an Amazon Firestick to another TV in your house and watch the recorded material from your TiVo Bolt.  The app is not available for Roku yet, and it is only in beta form for Amazon Fire (and its been in Beta for almost a year).  You do not have full control of your Tivo, just the ability to watch recorded shows.  And the video quality is quite a downgrade from the full HD.   A little disappointing, particularly since the streaming to other types of devices is top quality (albeit smaller screens). 

The best way to watch your Tivo stuff on another TV is to buy the Tivo Mini, which is about $130.  It gives you full control of the Tivo and HD quality viewing.  I would say if your second TV gets a lot of use, then go with the Tivo mini.  If its just a TV in the kitchen, or spare bedroom, then the Fire stick should be fine.

So, here's what you need:

High speed internet connection with reliable Wi-Fi.  If you already stream movies and the like in your home, then you probably already have this.   Make sure you check for data limits.   I did not come close to my limits in the first month, but if you ever fall asleep and leave an app running you might have problems.

Tivo Bolt.  500GB = $200; 1TB =$300.   Monthly subscription is $15, annual subscription is $150, lifetime is $550 (note:  My ATT DVR was $15/month).

A streaming device for every TV.  The cheapest Fire stick is about $40, and you can always find them on sale.  The Fire TV, which includes ethernet connection is $100.   Roku is similarly priced.   If you want to be future compatible, get the latest version of each which provides for UHD 4K streaming, even though there isn't much content available right now.  I plan on upgrading to 4K some day,  and by that time today's new devices will be yesterday's discounted devices.

A subscription to Playsation Vue = $35.

I already had subscriptions to Netflix and Hulu, along with Amazon Prime, so I don't include them in the extra costs here.   You can get HBO Now for $15/month (which is the same price cable companies charge you -- Except ATT which was charging me $16/mo after a three month trial period).  Showtime is available for $11/month, but that price is dropped to $9/month if you just add it to Hulu or Amazon Prime.

I already had a Roku 3, so I am suffering through the poorer quality Playstation Vue on my big screen.   I really hope they improve that app.  Adding everything up, my upfront costs for outfitting two TVs  was $390.  (antenna, Tivo Bolt, Roku 3, Fire Stick).  Add a little more if you go with the Tivo Mini, or a higher quality streaming device.

My monthly costs for Tivo and Playstation Vue are $47.50, compared to $118 I was paying for ATT's "U200" package (the cheapest package you can get that includes SEC TV), plus the HD charge, the DVR charge, and the extra receiver I had.  So a savings of $70.50 a month.   Really $71.50 if you add in the extra dollar ATT was charging me for HBO.

 Like I said, I don't include the charges for my other streaming services, because I was already paying for those.  If you don't already have Netflix and/or Hulu, then you can add that charge in to your costs, but you should also realize your TV viewing will change significantly.