Getting close to ordering Dual Core, which one would you go for of the following given they're similar price? New Dual Core 2Ghz, 2 Gb RAM 250Gb HD, 6600 256MB 56k OR 2.5Ghz DP 2.5Gb RAM 160 Gb HD R9600XT The latter is refurbished or Apple stock from a dealer, I can buy 2yrs Applecare for another $250 on top of 3mth warranty. I editing using FCP 4.1, DVDSP 3, PS CS maybe Aperture later. I see DC 2Ghz speed is more like 2.3DP so 2.5 would still be better machine. I had heard current Apps are optimised for dual proc architecture rather than dual core - which suits me since I don't see a need to upgrade Apps yet. PCI-E vs PCI-X not relevant to me...I don't envisage ever putting a card in just editing SD DVCam for years to come and Nikon NEF for image processing.