Origins, the second one on that page or the third one ( in the Pro section that is ) will work for you as far as gaming goes. They have a gig of ram, a decent enough graphics card, and the dual core processor. It should work out rather nicely.
I'd recommend going with one of the new Sony Vaio ( Or however you spell it ) machines myself if you want a gaming laptop... But two of those three pro machines should be just about as good.
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I don't have many games, I mainly use the windows side to play counter strike and Quake 4, and both operate smoothly and quickly (though I guess that isn't saying much).
Considering the requirements for Quake are pretty sick, they recommend a 4ghz machine with the latest graphics card and about a gig of RAM to run it's high settings ... 2ghz for the low settings with like a Radeon 9800 Pro or better and 512 of ram... But I wouldn't recommend running it on those settings. I wouldn't say that's not saying much if it runs smoothly on your laptop.