If you want 1600x1200, then you should go for 20' models. And there's no fast panels that are really good for gaming with this diagonal.
But from other side. What do you need 1600x1200 for in games? Even if you're owning top zuper computer than 1600x1200 may bring it to knees. And lower resolution interpolation for all LCD monitors are rather tough task.
I personally recommend to check Samsung 172X. Maybe the fastest monitor among new releases. Not sure about Hydis's, because I have not had chance to test them myself. Prophetview was hard to find. And another one from Hitachi is a rare find here in USA.