If you're set on <$550 for a 65" 4K tv I'd just go with the cheapest one you can find that has the inputs you need. They're all going to be entry level and they're all just going to be decent at best, might as well save as much money as possible.
TCL 4-Series (65S425), Vizio V-series (V655-G9).
If you bumped up the price range a couple hundred dollars the TCL 6-series and the Vizio M-series are pretty well rated mid-range TVs.
Check https://www.rtings.com/ for some good reviews.
TCL 4-Series (65S425), Vizio V-series (V655-G9).
If you bumped up the price range a couple hundred dollars the TCL 6-series and the Vizio M-series are pretty well rated mid-range TVs.
Check https://www.rtings.com/ for some good reviews.