Oh, we're not questioning that you know the hardware specs of the things you buy. We're just wondering if you know what those specs actually mean, and how they affect the overall picture of a machine's performance.
Anyway Mikan, are you still looking for a quad? Because a mid/high-end Core 2 Duo would make a better laptop gaming machine. I'm not sure if that's going to fit within the budget though.
And again, forget about using all 4 pieces of RAM. I don't know of any laptop chipset in the Montevina platform and earlier than can utilise more than 2 channels, anyway; even the PM45/GS45 chipsets (on Montevina) support up to 2 channels maximum.
In my opinion though, if you're looking for a gaming machine and you don't need the portability, just go for a desktop. You can get better performance for a lower cost.