I've seen a lot of iMac G5's listed for sale here and at other sites. We've all read about the fan/noise issues and that the performance gains vs G4s are not all that amazing. I'm wondering if overall many people buy the iMac G5 and are left underwhelmed and then look to sale it either to upgrade to a PM or to downgrade back to a G4-based machine. Any thoughts? I have a 1Ghz G4 iMac and I love it but I'm tempted to upgrade. I'd like to speed up iMovie and iDVD encoding. But I much prefer the look of my G4 iMac so I'm trying to hold off on the upgrade.