Honestly, I do not know. Dell has some pretty good displays tho, and they stand behind them with a 3 year warranty.
I know one of Dells 19" LCD got stellar reviews, check google and search for the model # and the word review, you can read for yourself.
I just got a Dell 2405FPW 12ms and it is awesome!
No dead pixels either.
I am pushing it with a HiS X1800XT and an Opteron 175