As knucksy said above,I would be looking more to the future for the Ps5,and even include the new Xbox and maybe even the pc if The Show is ported over to those.
I've been looking at a new monitor also,with the number 1 attribute being it is a HDR monitor.The market is somewhat limited (and a little pricey) but there are some out there.
LG and BenQ have a an HDR model,but the reviews are mixed. I have an Asus 32" 1440p right now,but since I got the pro and a 4k 55" Samsung,my game is much better on the big screen.
If this is not an issue and you got to have it right now,and most of us are playing at a balanced or faster setting anyway,due to stutter issues
,, then you should have little problem finding a non HDR 2 or 4k monitor in your size and price range.
I plan on holding off awhile until the HDR market picks up and we start getting some info on the specs for the next generation of consoles. Good luck.