For gaming, try to say away from server/workstation intended hardware. You'll do more harm than good. Go with the Core 2 Duo and 7600 GO (I thought it was GS and GT?). The Xeons might have more cores, but it's designed for servers, and the FireGL card is designed for workstation uses like graphics design and so forth.
the FireGL may outperform in web design but it'll slow you down a ton if you do any gaming. If you seriously don't do any gaming, go with the FireGL, but if you do any at all, the 7600GO will pick up the slack for any webdesign you want to do as well as game.
Alvino, the 7600 "GO" is the laptop version of the 7600.