I guess my question is how much better do people think the new Mac Pros will be? Better bang for the buck? Should I wait? How much better will the new ones be?
At this point it depends on how desperate you need this machine. I've bought my MBP CD -- knowing that C2D should come out in a few months, and a difference will be quite a bit -- because having to go to Africa in a week or two for shooting and writing with a near-dead laptop seemed a bad idea. Without this urgency I'd probably wait.
Problem is, nobody here knows when Apple will launch this new MP.