If you live in Southern California
I saw a dude selling 21" SGI monitors at the ACP and TRW meet last week... $125!!! These are the black ones which came out in 1999-2000. My dad and bro each bought one and I am shooting myself in the foot for not getting it. The quality on these things rock.
Otherwise, I'd go with Trinitron or Lacie if you plan on spending good dough. IF you're lucky, might be able to find a kickass Sony 24 inch.