I plan on undervolting the processor so that I can kick the cpu fan down to 5V. Which of the p4's run the coolest? I was thinking of going with a 2.4 with HT, but am not sure if I even need the HT. Also have no clue which revision of the CPU I should go for. My guess is go with a 2.4 GHz. I'm open to other suggestions. The purpose of this box is a quiet home server. Thanks!