I am an old die-hard Apple display fan so I use the 24" Apple Cinema display from 11 years ago...
The Cinema Display's black bezels from yesteryear doesn't match the new iMac's bezels, but for everyday typing, it's a good non-Retina display.
By using the Cinema display with built in webcam, I can choose either the 1080 high res M1 or lower res 720 Facetime camera depending on how bad/good I look....