I like to replace my ancient G4 sawtooth Power Mac with a new Mac Pro. And have narrowed my choice down to two models. The Mac Pro 2.66 ( 4 core ) priced at $ 2399.95 vs the Mac Pro 2.8 ( 8 core ) priced at $2899.99. Both systems are brand new, unopened boxes and in Canadian dollars. My question is which one provides the best valve or bang for the buck. I'm leaning towards the Mac Pro 2.8 but at the same time thinking I don't need that much power. I'll be using the computer for Final Cut Studio, Logic Studio, Adobe Creative Suite and Aperture. I plan on keeping the computer for 3-5 years. Thanks in advance for your help and suggestions.