Ok, I've come to the realization that I do not need a MBP anymore and am selling for a Mac Pro. I want to know just how much faster the 8 core 2.8 is over the 4 core 2.8. I'll be buying a 20" ACD with this (I'll hate it if it isn't Apple, trust me, don't try to convince me otherwise), and with that 4 core downgrade, it's a little more affordable, but will it make a difference to me later down the road and can I upgrade the quad to an octo down the road, the other threads haven't been too conclusive on that. As well, in order to best utilize the processing power (ie more than one core), will iMovie (ha ha, prolly not), FCE, and/or full blown FCP use all the cores?