1. There are no 19" LCDs which are comparable.
2. Your Dell has an LG.Philips S-IPS panel, which is thought by some to be "best in class". There are only a few comparable 20.1" models by other makers. Offhand, I can think of NEC LCD2070NX, and NEC LCD2090UXi. Other candidates with I recall having PVA or SPVA panels might be Samsung 204T and Planar PM2011.