I'm thinking about selling my ~two year old MacBook Pro in favor of a 20" 2.66 Aluminum iMac. I really don't use the portability of the MBP, and it's way too hot (at idle the bottom enclosure is 95 degrees F!) to actually use on my lap so it really hasn't moved much from my desk in the last two years. I don't play games ever, so 3D performance is a non-issue in going to the iMac. However, I do look forward to the faster hard disk with the 3.5" SATA drives (as I perceive this to be a major bottleneck these days in notebook computers in real world tasks). But the thing I'm curious about is if there are any long-standing issues (minor as they might be) with the 20" model. I've had my share of issues (nothing major, but would have liked to know beforehand) with new Macs and just want to know what I'd be getting into. I read on these forums and the Apple boards about bands of horizontal lines appearing on the screens but that seemed endemic to the 24" model. Can any 20" iMac owners comment on their overall experience? Are the machines quiet? Any quirky things I should know about (for example, but friend's older 24" iMac makes this low-pitched buzzing sound whenever the screen brightness is not set to full brightness...kind of annoying at night when it's dark and quiet in his study). Thanks!