Just to clear up with response(ms), lower is generally better, but depending on how its down, some users will see more overdrive artifacts on those 2ms screens(But the overdrive on SPVA's like mine while not noticeable to some are very strange looking.).
I hate getting a screen without at least looking at it. Example here would be a Asus PA238QR. e-IPS(cheap, but supposed to be better then TN) 6ms response(and the overdrive can be adjusted, this feature is very good). On paper this thing is actually very good, but it can not produce very dark colors too well. The "Game" mode helps with the darker colors, but results in color banding in the brighter colors. Viewing angles are also less then hoped for, but anyone coming from TN will most likely find this Asus screen to be a good upgrade.
The price for the NEC is very good as long as the screen lasts for a good while. Backlights can fail without much notice
I also have a preference to 16:10 screens to begin with...