[Daniel Frome] “If rendering is your primary gig, then more cores are better, but I’ll take a guess and say that the 6 core config will be the fastest option for video editors. 6 cores is already plenty CPU horsepower, with the clock speed ultimately making the most difference in day-to-day editing tasks.”
Obviously, we need to see some numbers on this, but I would be worried that any MacPro configuration in the 4-core arena (and less than the D700) is going to show only marginal improvement (if any) in day-to-day operations over an iMac with the 780M 4GB. If I was purchasing a MacPro at the moment, I’d be opting for the 8-core D700 32GB RAM version at the bare minimum.