No. I'd go as far as to say it is not a good gaming computer.
The processor is great, and the RAM is over the top as far as gaming is concerned.
That GPU is not very good, and will easily bottleneck you. You should definitely look into a better GPU, and when you find one you should consider a monitor that supports full HD(1920x1080). Also you should probably consider a laser mouse instead of an optical mouse.
The power supply is a bit on the strong side, but will work.
I probably wouldnt buy that mouse get a cheap microsoft optical. Buying a cheapo laser mouse is asking for trouble a dodgy sensor and your screwed and in that price range I doubt greatly its any quality.
Personally would buy this PSU after the mail in rebate its only $69.99