I have a chance to purchase one of two used Mac Pro's, which I'll be using to run Compressor 4. Choice 1 is a a 2.8GHz 8 Core 2008. Choice 2 is a 4 Core 2.66GHz from 2009. Looking at benchmarks from Everymac.com, the 2008 machine is faster than the 2009 machine. However, would Compressor 4 run better on the 2009 Mac Pro on account of it's more advanced architecture?