Comes down to your budget. But these are some good units...
https://pcpartpicker.com/products/monitor/#H=144,240&sort=price&page=1
https://pcpartpicker.com/product/PmyFf7/acer-monitor-umfg6aab01
Not much difference among them except brand value and aesthetics, the Asus unit being a more popular choice. You can go for either.
Ohh, and the Asus unit has built in speakers.