I'm in the process of receiving the WD 120 Gig, 7200 rpm, 8 Meg cache from dell.com. I was wondering if you guys think I need a HD cooling fan. I've heard mixed opinions and i still can't decide. I'm currently running 2 hds, a 20 gig and a 30 gig and they seem to work fine without one. thanks a lot. i appreciate it