Whenever you decide on brand and size, I would definitely check out your local Sam's club before you buy from somewhere else. I bought a 75" Vizio from there a year or so ago, and saved about $300 on it versus a competitor.
I'm not a TV expert, and it's just not my thing to research and understand all the specifications. But, I've really enjoyed my Vizio. I know it's a 4K LED. That's about the extent of my knowledge. It's got a couple minor glitches, that I've noticed, when switching between Inputs, particularly when switching between their "SmartHome" app and the PS4 (HDMI Input). But, nothing that effects the quality of the TV or anything, just a little aggravating sometimes. But, the picture is incredible. I've really enjoyed it.
I would also agree with the other poster who said that if you can find a nice TV, that fits all your needs for $900-1,000 (and I think you very well could), then I would spend the rest of the budget on Sonos Soundbar or sound system. It's crazy the difference it makes.