Mine was good price and performance when I bought... Sony 65" X850C, Lovely TV

Id go with Samsung 4k however if you can purchase LGs OLED than definitely go with that if price isnt an option. Any model beyond 2016 so you get the good HDR and tech.
Pro probably isnt worth the 4k jump. Its average resolution is 1440p. If you had the X than its more necessary to own a 4k screen. If you are just buying a 4k screen for the Pro id probably just wait for a really good sale.

I own a KS8000 2016 Samsung and its colours are amazing plus affordable. 

The way I see it when I compared all the TVs before I made my purchase, if you want the best Darks go the LG OLEDS, if you want the better Bright's go with Samsung's ULEDS. For gaming I much prefer the bright colours hence my purchase. Samsung still has some of the best engineered LED TV options out there while with OLED, LG seems to hold that crown.

How can we be sure a 2017 won't have any issue related to this if for most customers it had very low use (yes factory test can discover some cases, but they can't really rule out the possibility 100%)

Bought the Sony 55" X900E from Amazon.

Best
-Sony Z9D

Next Best
-Sony X930/940E
-Sony A1E

Runners Up
-LG W7P
-LG G7P

Getting By
-Sony X900E
-Sony X850E
-LG E7P
-LG C7P
-Samsung Q9F
-Samsung Q7F

That is my take on current TVs. I wouldn't go any lower than the Getting By list. Worth it to save and wait to get a TV that can do proper HDR.

I personally prefer Full Array Local Dimming over OLED, because the peak brightness is much higher in a good TV, and the black levels are still very impressive.

I choose the Z9D over the A1E or the W7P/G7P. For me the unmatched peak brightness and true white, with near perfect blacks, was a bigger draw than perfect blacks, with underwhelming peak brightness, and yellow looking whites.

Hmm my X900E seems possessed by Netflix. I just got back in and for the second time this week it has turned itself on to the Who's watching Netflix screen after I had turned everything off for sure. I did watch Netflix on it earlier today.

I disabled remote control from other devices in the settings which I hadn't turned off before, maybe that helps. (All other remote wake ups and what not are off as well) When I google it the same issue comes up with Samsung TVs. Maybe it's the Android OS doing it, the tv had a software update a week ago. I could always unplug it but the boot up sequence takes half a minute (fuck modern tech)

At least the Netflix welcome screen shouldn't burn in over night on a LED tv, yay?


Update / Solution:

Apparently it is the OS that keeps the apps running in the background. Both times I had watched Netflix before it happened and it seems there is a bug in the OS that it can sometimes switch back to the still waiting Netflix app in the background after turning the tv off. To make sure it doesn't happen, press the home button for 3 seconds which brings up a list with the running apps and dismiss Netflix before turning the tv off.

Your Z9D must be blazingly bright! I find the 900E very bright already and that's less than half the peak brightness of the Z9D.

I'm used to watching movies on my projector set to 15fl open gate brightness for home theater, which is 51 nits, 7.5% of what the Z9D produces in sustained open gate (full screen white) Amazing how tech advances! Projectors are really outdated now, no great black level and woefully unsuited to HDR, yet I love the size. Still feels like sitting in the cinema.

Thanks for all the input guys. It at least gives me an idea of what to go for. My current TV is a plasma and I remember getting image retention after playing a few hours of God of War. The health bar showed up everywhere for a long long time, so I'm not sure I wanna risk buying a new TV that can have the same problem.

I like the Panasonic OLEDs. The software in them seems to produce a more natural colour than the LG or Sony panels.

How much will you spend at most? Which screen size will it have?