Yeah, I am with the above poster. For mutli-monitor gaming, you may be able to see if the screens do not match.
To be honest, most 2ms screens I have seen have real bad overdrive artifacts, but that is just me.
I am all for IPS screens, but keep in mind they have much lower contrast(fixed not that dynamic stuff) then some other screen types(lets say VA based), but better viewing angles.
I highly recommend looking at screens in the store on display because all users have a different requirement.
Maybe I have been spoiled here, but I fine many screens have lots of trouble with dark colors as well as glow on many of the newer ips screens.
S-PVA has its own down side and that is overdrive artifacts for sure.
S-PVA left E-IPS on the right(25% brightness on the S-PVA and 100% on the e-ips, it did not help and just made bright colors TOO bright to me.). The camera can see more then me, so the images are a bit darker in real life.
http://imageshack.us/a/img441/4199/dsc0262dr.jpg
http://imageshack.us/a/img600/7891/dsc0252jn.jpg
Then you have TN, fast response, lower color, less viewing angles. Generally for just games, many will get TN. Its cheap and fast, just remember to check in store if you can, some have very bad dithering/color banding.