IMO, I wouldn't worry too much about a TV's refresh rate. Refresh rates are mostly a gimmick. TV's use a process called interpolation to "add" frames to make motion appear smoother. The most important aspects are black level and color reproduction. Ideally, you can pay to get your TV professionally calibrated to ensure color reproduction is as accurate as possible or you can use a free calibration disc.
Further reading https
/www.cnet.com/news/ultra-hd-4k-tv-refresh-rates/