I like NewEgg. I have bought from them many times and have never had any trouble and they always get my stuff to me in about 3 or 4 days (not counting weekends).
I’m have a Viewsonic P95F+, which is a 19" CRT (cathode ray tube, the big clunky, old-school style monitors) that I have been very happy with. They’re a somewhat higher quality among consumer level monitors and Newegg has them for $279 USD w/ free shipping (and it also comes in black). You could find 19"s for cheaper than that too, but be sure to look for some reviews so that you don’t buy an ultra-cheap one that’s gonna die in a year.
Flat-panels are very nice, especially since you don’t play games (some LCD’s don’t like certain games very much). A 17" LCD is roughly the same screen size as a 19" CRT (an 18" LCD is exactly the same screen size). Expect to pay roughly $400 USD for a 17" LCD though.
Hope that helps you some. 