Old thread, and you probably made up your mind a while ago. But, I just got this TV in the 65" yesterday, and I recalled this thread and wanted to add to it in case anybody else was considering it. I've been looking for a 65" 4k with HDR since Black Friday, and finally jumped on a refurb deal on this ($492 no tax, delivered through eBay. Now expired). Best price/reviews I've seen. Sam's had a Hisense for $499 the other day, but I'd already ordered this one. Anyhow...
Longevity will be key, but my initial impressions are off the charts (for the price). Obviously, it's no LG OLED, but for under $500 the picture is outstanding. I really like the baked-in Roku interface, it's familiar and intuitive as opposed to most smart TVs custom-built garbage interfaces. And sound is even pretty decent. I'll be wall-mounting and hooking it up to my receiver ultimately, but I set it up yesterday just to test functionality in case I needed to return. Loving it so far, highly recommended.