To tell you the truth and I know this is gonna sound realy cliche but it is the user of the computer that is gonna matter more than the machine, I bet there is a good number of users whose computers have never been significantly pushed too hard. Buy the MBP and then you will have something to be angry about.
I just bought my MBP this Saturday and couldn't be happier (except for a possible gap when it's closed, I'll post a pic eventually). The only thing I'll be dissapointed in is if in January they announce a BR player/burner for the MBP, and that if I really needed it I could always get an external. A .2 ghz bump in speed isn't that necessary to me now.