I use this very heavy Thermaltake Case, However, I've also been playing around with Making an acrylic case. Of course, Acrylics don't do much for Keeping things cool. That being said, My ThermalTake case is awesome, and I have 7 fans in it, not even counting the Videocard and CPU fans.
I'd strongly suggest one of there cases, as It's relativly Cheap, But give's you Room so you won't have Nicked nuckles. There is only one Case that's better, But I forget the name, I believe that Tracy G in australia has one though.
Let me know If I can offer more advice.
Stephen