If you're not against buying used equipment, you can hop on that boat right now! I had (well, still have, as I've not sold them yet) three perfectly-fine BDP-83s. I wanted newer decks, mainly because I was a little impatient with the load time on the four Modern Family season sets. That's really pretty much the reason. Otherwise, they still played everything I've thrown at them great. Load times on some BDs is a little slow, but not too bad (except the aforementioned discs). They're built like tanks and still work great.
Anyway, to replace them, I bought three used BDP-103s, and all of them cost less than what they were new (so, they're not outrageously marked-up like Oppo's two 4k players). Like my current setup, I also bought two multi-region hardware mods, and for the third player, I'm just using the SuperDisk software hack to get by with region-free on DVDs only (if you'd like a "deal" on a good BDP-83, drop me a PM!).
If your distance is 8ft away, I'd recommend a 40-42 inch set. If your distance is more like 12 ft, you should be able to get away with something in the 50-60 inch range.I'm going to have to do some screen size testing (SD viewing distance calcs); my room is limited in size and so I'm probably only going to be 8 to 12 ft from the screen. I know that limits my TV size options, of course. (Which for DVD viewing might be a good thing.)