My opinion, buy a dell. I ordered their new XPS system last week should be here soon... Supposedly built for gamers
http://www.dell.com/us/en/dhs/produc..._dimen_XPS.htm
Looks to be about the same as that alien one except larger harddrive as a free upgrade, a dvd drive in addition to the cd/rw one, and maybe some other differences i'm missing.
Oh and I don't think dell gives you a free t-shirt if that's any consideration.