I wouldn't advise anyone to use a laptop for gaming, even if it is made for games, i mean what are PS/Xbox's for:?
I know thats some people don't like Dell, but i've had mine for almost a year, and theres been no problems so far :)
is a pretty basic one from Dell with 1 GB Ram and 80 GB Hard drive. Plus it comes with 1.76 Ghz Dual Core Processor & an option for Windows XP
ones are a bit more advanced and a lot more expensive too
If you do decide to get a Dell, rather than ordering online ring them, you can usualy get them to throw in a few freebies :D