What Would we Buy?
There are so many of the best 27″ 4K monitors but these 5 ones should more than just suffice. Above all, the LG 27UD88-W is layered with the right features for the right price. Following up, the AOC i2779vh is best if you want something that is cheap as possible for a 4K gaming monitor without the extraneous features. For ergonomic purposes, the ViewSonic XG2700-4K is best at it with lots of color configurations, tilts, swivels and height adjustments. The Acer Predator XB273K comes in as the best 27″ 4K monitor if you need one for competitive gaming purposes. Finally, the Acer Predator X27 may present as a tough-looking esports monitor but it is also the most gentle when it comes to colors.
Whatever you choose is good, of course. After all, it all boils down to preference.