aluminum cases are my preference this bout half the weight of the old steel ones i used to use you really notice it when goin to lan partys. and stuff really does run cooler.
this one (Skyhawk ALP4350U-SL ) is like 100 bucks with a 350w amd approved power supply and 3 80cm case ventilation fans with shipping lots more like it on pricewatch.
good luck
http://store.yahoo.com/dealsonic/skyhalalatxm.html