I have a question regarding the new Mac Pros vs. the last model. I have the last generation (2 x 2.66 Dual Core) and am currently looking to help a friend purchase a mac pro. It will be used mainly for photography work (Lightroom, Photoshop, etc.) While looking at the online store earlier today, I was checking out the refurbished models and happened to notice that there was a model exactly like mine for $2k and also one of the newer models, except a four-core model, with what seemed to me to be higher specs (more RAM, faster RAM, bigger hard drive, etc.) that was also priced at $2k. This was somewhat confusing to me because I was under the impression that 4-cores was 4-cores, no matter how you sliced it. Is there some type of benefit to having multiple processors, even if it amounts to the same number of cores? I have advised her to stay away from the 8-core model and instead stock up on RAM and drive space because in the time I have used my Mac Pro (graphic design, photography) I have never gotten close to working at full-power or seen any slow down. 8-cores seems like overkill to me for her purposes. I am however concerned about the difference between 1 and 2 processors now. Any thoughts? P.S. The newer refurbished model appears to be gone now, so apparently it was a pretty good deal!