I switched from desktops 10 years ago mostly because they were noisy as hell. Went through piles of "silent fans" like Zalman and Thermaltake and still couldn't get acceptable silent desktop. And there was also factor of noisy harddrives. Now I am upgrading from iMac 24" and choosing between iMac 27" i7 and Mac Pro. I've been using MBP and iMacs for past 6 years and now I am reluctant to go Mac Pro for this particular reason, that it will be too noisy. iMac with i7 CPU will be noisy aswell? And since I buy custom config from Apple online will I be able to return it?