The Dell monitors that have already been mentioned are good choices, especially the 1907. I have the older 1905 and it is the best looking monitor I've seen. If you do decide to get this one, you may want wait a little while because Dell almost always has them on sale.
If you'd rather have a quick 2ms 19" panel, I think you'll like this Viewsonic
for $260. For a 2ms panel with a little more real estate, this 20" Widescreen Samsung
is a good choice. At $310 it's a little higher than your budget, but Samsung is currently offering a $30 MIR for it that expires a week from tomorrow.