I am pretty sure there are a few threads about this very topic already, however....
A good bet is to look at the Dell monitors. I am viewing by way of a 2001FP currently (20.1 non-wide). Dell pseudo-recently released a 2005FP which is the 'same' 20.1" screen in a wide-aspect. Actually, the model is the 2005FPW (did not know they added the W but it makes sense, way to go Dell 😛)
Current Home/Home Office price is around $750 USD but if you can get a student discount that can save you more, or check between Home and Business stores as the promos vary. Just keep checking and read up in some deal forums and sites, Dell stuff always gets cheaper and cheaper.