The Stacker style cases are really good for watercooling, since there is plenty of space to keep the watercooling internal. The Stacker 830 is probably the sexiest at $230+, then the Thermaltake Armor for about a hundred less. The Lian Li V1000 and V2000 series are also good for the high end, or their older cases, the 7 series. If you want to burn a hole in your wallet, look into Silverstone.