LG 27 "4K UHD IPS Monitor with FreeSync | $ 225 | Amazon
This is 27 "monitors LG games Checks a ton of boxes when it comes to what you need in a gaming bench. First of all, it has a fixed response time of 5ms, 4K resolution (3840 x 2160) and now it comes down to a very good price.
While its 60hz refresh rate is kind of a bummer, it's still a solid contender for non-competition players. Although not very accurate for first-person shooters, it does promise appropriate colors (99% sRGB,) for good viewing angles, and excellent bezels.
This is a complete steal, and $ 75 closed the last time we put it.