Ok, so I officially hate you! LOL just kidding. I want a Mac Pro as well, but I am waiting until the Spring so I won't have to upgrade to Leopard and iLife 07. I can't say it's going to be an EASY wait, but I have a gaming PC and a 12" Powerbook, so there really is no valid reason to get one now. Besides, I'd prefr to wit for the Rev. 2 models, and the things I've been hearing about BootCamp problems should be all squared away when it's time for me to buy. WHo knows, there may even be a speed refresh by then.
An AMD 3800+ X2, Radon X1800XT, 2 gigs of memory, 74 gig Raptor and 400 Gig drive, full watercooling, is all going bye-bye when I do get the Mac Pro. That will be my complete switch.
I still can't beleive I'm doing it. I've been a hardware enthusiast/builder for about 4 years. But my Nov 2005 - September 2006 experience with Apple and my Powerbook has convinced me that the full swich must happen.