Honestly, I know how nice a good laptop can be, especially one that can handle recent games on decent settings.
But it's going to be double the price, and a new gaming PC will still be very nice.
I shop almost exclusively at newegg.com...tigerdirect has deals sometimes, and always check slickdeals.net for recent deals on various sites.
You could buy everything you need tonight, though I wouldn't discourage taking the time to find the absolute best price to performance package.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )