best external display for apple mini 3 or 4
Apple mini 3 or 4.what display (21 inch) affordable would be best for an apple mini 3 or 4?
Most any aftermarket display will work with the Mac mini.
see > Connect a display to Mac mini - Apple Support
Aftermarket external display size options are generally 21.5/22, 24, 27 or 32"
There is no way to recommend what is the best display for your use or visual need.
Best bet, is to go to BestBuy or someplace like that and look at what they have.