If you are hooking up the Wii the only "real" option IMO is the Gateway 30" screen with the HQV processor.
Standard definition sources on all Dells, Samsungs, and HP LCD's have been quite crappy to say the least.
Then again, for the price of the Gateway 30" screen you can get a nice Sharp Aquos in a 46" size.
If you plan on using it for computer use only though I'd suggest the Gateway even with some of it's flaws. It's still the superior choice when viewing non-native resolution sources.
If you aren't then a nice dedicated LCD or Plasma TV would be a better choice.
Regards,
SB