I had the same problem some others had with the slow startup of the new iMac. It would give me 40 sec to a min of white screen before seeing an Apple logo. It wouldn't even boot on my initial startup, I had to force shut it down and retry. So I did a erased the harddrive and did a clean install - problem fixed! Full bootup now takes 25 sec or so. If your iMac is taking longer than 5-6 seconds to show the Apple logo on the white screen on startup, you might want to consider doing this before you get too far into moving your files over! I wonder if they put a bad batch of software on in the factory - fortunately all is right with the recovery discs.