Samsung released a 21" 1600x1200 screen months ago. The 213T I believe it's called. We have one at work. It's a beautiful display. Samsung have some of the best bezels in the industry and very decent screens. You might also like to look at models from Eizo and/or Viewsonic and NEC.

If you don't mind larger bezels, the Formac Gallery 2010 is also a very nice 1600x1200 20.1" (using a Fujitsu LCD)

Bruno