If you've always wanted those Aliens-shaped Alienware cases but never had a high-paying enough job for one, this P2 Chassis is a good compromise. You pay $399 for the shell, which comes with a 700-watt power supply, blue LEDs and the quality construction Alienware PCs are known for.
Still, $399 is pretty steep for a case, even if it is Alienware. You can get a pretty decent- looking one, plus a good power supply for $200-ish.
Alienware Now Selling P2 Chassis as a Barebones Kit [Computer Shopper]