What monitor to use with a new mac mini?

You can use any modern Display (monitor) with a Mac Mini.

For HDMI Displays and TVs you only need to use a regular HDMI cable.

For DisplayPort, DVI or VGA Displays you need a corresponding TB3/USB-C adapter.

For a list of adapters and cables have a look at > Connect a display to Mac mini - Apple Support

I am very happy with the 24" LG display sold by Apple. No camera or microphone, though.

LG UltraFine 4K Display - Apple

What display you get totally depends on your intended

use and your budget. Without that, one can really not

recommend any type of display.

You’re welcome! Personally I do not care for the iMac’s glossy display and use dual matte finish Samsung displays with my Mac Mini. I would recommend that you shop for a display that fills your needs, taste and budget.