I absolutely love mine. Super fast, beautiful screen, surprisingly good speakers, awesome keyboard and generally silent except........
My only concern is a noise I hear occasionally for a split second, it sounds like a cracking or popping type sound. It happens very infrequently and seems to be when I first turn it on, after a few hours it seems to stop happening. My guess is that as the iMac heats up plastic parts on the interior expand, I am sure everything fits really tight inside there.
Does anyone else hear this noise coming from their iMac or know what this might be?