The distance and the budget call for 75-85". I have had good luck with an entry level Sony. I bought an X85K 85" two years ago. It's one step above the cheapest model. The cheapest model was an IPS panel which had a bit shittier performance. I don't recall in what regard. X85K is a Samsung panel. It's a standard no-nonsense LED side backlight which is very robust over time. The original unit was a lemon. It developed a line across the screen. I got it replaced under warranty. The second unit has been flawless so far. Software-wise, it's a bog-standard Android TV/Google TV. Doesn't require Internet connection to setup. With that said I use a CCwGTV with it and I don't hear a peep from the TV OS about anything. The only thing I didn't like about it was the price at the time. I bought it straight from Sony, they ship from GTA. It was available from other retailers too. I think this model might still be current actually. I still see it on Sony's web along with another one - X85J.

Prior to that I had an entry level Samsung 75". It was fine too. Didn't require Internet. The panel was a similar affair, slightly worse in terms of blacks and uniformity but I'm sure that wasn't due to its Samsungness but was simply a cheaper panel than what Sony uses.