these are usually values used for good marketing. there's no way rise/fall grey-to-grey combined would be 2ms even with a fast TN panel. i personally would rather look at connectivity, ergonomics and picture quality than response times.
ergonomics how i look at it:
- hight adjustable
- tilt and pivot
- no bright LEDs
- no humming power supply
- it may matter to you for surround gaming: unit footprint, weight, power consumption, heat dissipation
- picture easily adjustable, perhaps by software or calibration unit
as i am a fan of good build and picture quality i'd probably go for an S(H)-IPS panel like the HP Z24w. i'm aware that's not the cheapest one but i just had one tested @work and we're very happy with it so far. but of course, if you wanna go 3D, then that's nothing for you. i don't like 3D. been there, done that. more than 10 years ago.