If you have the deskspace (& a good video card with dual outputs), get two 21" (or larger) CRT's. If you don't, get the LCD. I run two 21" Viewsonics at the office each at some ridiculous resolution (>1600x1200) and love it. I'd never do that at home because it takes up too much room (I have a 3 year old 17" Samsung 171B). Oh yeah, the two 21" monitors cost about $600 for the pair.

-Zeke