Start with a budget that you can afford, don't go into debt for a TV. Find 2-3 TVs that are in your budget now and 2-3 TVs that are outside your budget. Watch for the sales Amazon is doing their Prime Big Deal Day on the 10th, then the pre-Black Friday sales start happening, then Black Friday.
LG, Sony and Samsung are all going have great offerings. OLED is the way to go for movies, the deep blacks can't be beat. If money wasn't an issue, I'd go with the Sony A95K. If money was a small issue, then I'd go with a Samsung S90C or an LG C2. If OLED is out of the budget, I'd go for the Hisense U8K. I personally have the Hisense U8H and have been pretty happy and I've only heard better things about the U8K.
Rtings.com is a great resource and I pretty much picked all of this from their recent article:
https://www.rtings.com/tv/reviews/best/tvs-on-the-...