I started this thread summarising some info:
http://www.avforums.com/forums/showthread.php?t=612503
There is no absolute rule here, but IPS panels (Panasonic, Hitachi, LG, Philips, Toshiba) will tend to lag less than VA panels (Samsung, Sony). Sharp use ASV & I don't know about the lag on those, but they are quite popular with gamers on other forums.
100Hz/120Hz is a bit of an unknown quantity - the only tests I can find suggest it increases lag! Also on the Sony 100Hz is switched off by the game mode...
I was going to buy a 32-inch LCD (samsung)
A number of Samsung TVs & monitors have very high lag, though the small TN panel monitors are excellent in this regard. Basically I would avoid Samsung TVs for gaming unless you know what the lag is for the particular model that you are considering!
Turning off things like dynamic contrast & switching on game mode may help - basically do anything possible to reduce the image processing
BTW if it has anything to do with my video card I have 2 8800 gtx cards SLI connected.
Nothing to do with your video cards. Though if you turn off 'v-sync' you may get less lag at the expense of more image tearing:
http://www.behardware.com/articles/632-1/lcds-images-delayed-compared-to-crts-yes.html
With 8800GTX in SLI you should be able to maintain very high frame rate which I believe will help avoid tearing
I would recommend a Samsung 245B for a modest budget, gaming only monitor and a Samsung 275T if you want to spend a bit more for a larger general purpose monitor.
I don't agree with this at all (sorry!) - the 245B is a TN panel & the viewing angles are so poor that unless you sit very far back you will always have either a dark stripe at the top or a bright stripe at the bottom of the image.
275T has quite high lag anyway - seems to be a trait of 'multimedia' monitors as they share similar processing to HDTVs