Hi Everyone, I'm buying my first mac and it will be used for photo processing, audio recording, and general multitasking. I've narrowed it down to two choices which will be about the same price (roughly $2000). Which would you choose? 2.8ghz 8-Core 500GB HD, 4GB DDR2 800mhz ATI Radeon HD 2600 XT 256MB Used, about a year old with 2 years of warranty left or New 2.66ghz Nehalem Quad Core 640GB, 3GB DDR3 1066mhz NVIDIA GeForce GT 120 512MB GDDR3 Full warranty that I could extend to 3 years. I'm sure both will work fine for my needs but which will have the better performance now and which do you think will have the better resale after 2 years? Any other factors that I should consider? Thanks in advance for your help.