For gaming, a sub 20ms responce time is key.
Try the hitachi CML174SX series.
17" screen
16ms responce time
Its one of the best 17" TFTs out.
I have one, and games look so much sharper on it than my old CRT.
This is where loads of people will start arguing about TFTs for gaming. But the fact is, if you get a decent TFT, then its just as good, if not better than a CRT for gaming.