Re: Is this a good configuration for a gamer???
I would recommend a better Nvidia Card, like the above said the 8800GT is good, but the 9800GT would be better.
If you want to play games and continue to do so for more than a month, grab a Core2Quad.
If you have the money of course.
Else have a look at the optimum specs for the games you want to play, and get a bit above that.
-[Discipline] - Macbook Pro 5,3 - Intel Core2Duo 2.66Ghz, 4Gb RAM, Nvidia 9400M + 9600GT, 320Gb HDD, Mac OSX 10.7.1 Lion
-Windows free since May 2007.