I am currently using a Dell Ultra Sharp U3219Q and its really not bad. Good picture quality, sturdy build, 90W power delivery, sleep mode works properly (unlike a 4K LG I was using before). But it's not exactly cheap.
Or the more common alternative: how long is a piece of string?
'27"' is not really a differentiator these days.
What resolution do you want?
How important is colour reproduction?
How bright do you need it?
Do you want it to be height adjustable?
Do you want it to rotate?
Do you want speakers?
Do you want a USB hub in it?
Do you want a built-in psu or are you happy with a wall wart?