I'm not a power user, per se, but I've always used the middle ground "pro" Mac of the time. Usually in the <$2000 area, plus monitor if needed. I always considered the iMac good, but too limited. But two years ago I did the unthinkable (for me) and bought an iMac. I never liked the lack of expansion of the iMac. It meant giving up the add on eSATA port, the add on USB ports (I prefer them to hubs), the extra DVD drive, but mainly the extra hard drives. I loved having four internal hard drives. But i figured that I could make do with some external Firewire drives, a USB hub and a hard drive dock. It took a while getting used to it, but I did, and I'm happy with my setup. Well all except for the recall of my iMac's hard drive. It kills me because if it were user replaceable, it would have been upgraded by me long ago. I assume that there are others like me; users that jumped from buying Mac Pros because the iMac became an attractive alternative. Why buy a Mac Pro and a 27" monitor when you can get an 27" iMac for $2000? But with this further shaving down of the expandability of the new iMac, my eyes are looking at the Mac Pro again. Not the current one, of course. Does this ring true for anyone else?