Hello, I just purchased (last week) a 21" imac - core I5 2.7. This is my first MAC computer, just felt I had to get in on all the hype! (plus it was time to upgrade - my last computer was a Pentium 4) So far I'm pretty happy, I have set up boot camp and am so far enjoying the experience. The few things I've noticed that are a little irritating are: 1. When a USB external drive (it is a WD passport 750GB) is connected, it seems to slow the whole system down. This happens in both Windows and OSX. Switching windows, running applications, etc. As soon as I unplug the USB drive, performance increases dramatically. 2. Another thing I've noticed is choppy audio. This happens in just audio clips and video. Then sometimes it goes away. Really weird. I know Apple and Adobe don't play nice, however with this hardware, this should not happen. Any suggestions.