I use a 4k 49 inch tv which can do 62hz. Great for productivity. I use it as 4 1080 screens or 3x 1280x2160 tall screens. I have no issue with response time.
I use a PG279Q (ASUS 1440p 165Hz) screen for shooters, strategies, and online games, and my 49" FHD for action/rpgs/casual games with a controller, comfortable on my bed