I think 65 inches is just about right. That's my next TV.
It is good size for small to mid-size rooms. Plus even if you want a premium model say , Samsung, LG, Sony won't break your bank. Would I have liked a Sony X95L, sure but at 3k for a 65" no thanks. LG doesn't really make a good LED, QDLED. Now LG 65" Nano mini LED is a good one, their flagship LED will cost you north of 2k. Samsung, Sony LED, QDLED are the way to go.
But still anywhere between 1700 to 3K. Now there's the budget friendly TCL, Hisense and other's that have great specs on paper. Can get a good value for around 800 or so. But they're upscaling and smoothness is usually crap, Contrast isn't as good as you top tier T V's. I have a friend who's a TV repairman told me to stay away from cheaper brands they use the cheapest parts in them, processing power, much less ram, buggy. But as you know a Budget brand is what it is as, long as going in one should research and compare.
Sony, Samsung, LG has around a 11 to 13% of issues as opposed to the budget brands of 23+ % of issues. I have read reviews, even the Top 3 brands are not without issues though. My new Sony XR65X90L I picked up on July 3rd had two dead pixels had to return it for exchange on July 9th. Didn't notice it the first 7 days. Was by luck really, I didn't remove some clear tape on the bottom bezel. After removing the tape I just so happened to be really close to the screen about 1ft away, that's when I noticed the dead pixels.
Tried a factory reset also a pixel refresh still no go. Talk about lucky, BestBuy only has a 14 day return window, Unless your a BestBuy member then you get thirty days, you have to pay for that privilege. If one wants a OLED LG 65" C3 is the best bang for your money. Anywhere from sale price of 1599 to 1699. I did have that one on my short list.