PC cooling? it's all about airflow ... fans in the back (near CPU) should exhaust hot air... fans in front of case.. should intake cool air.
Try not to have any dead pockets in your case... to help, get round-IDE/SCSI cables ...
Very highly recommended to get an Aluminum case... dissipates heat quicker.. not to mention about 2x lighter (easier to move around if needed).
money's not an issue? and want performance? ... instead of just one scsi HD ... get 2 and Raid-0 them.. (striping) ...
and then.. u can even think about dual P4 xeon CPUs ...
good luck on a beast of a machine
