Ok, new here, if this has been answered already or other resources are available, I would appreciate any links etc. I purchased the base 8x2.88ghz mac pro in Jan (added 8GB RAM for a total of 10gb now), and my local Apple store said they would allow an exchange (with a 10% restock fee) for one of the new Mac Pros. Sounded like a good option. I'm a photographer so my primary use is: Lightroom 2 and Photoshop CS4. I'm more than pleased with the performance of my current Mac Pro, but if I could pay $250 to help future proof my system (and not see a 25% resale value hit in 3 months from now) it's worth it to me. I'm looking at the quad 2.66ghz, as I know that the 2 applications above do not really take advantage of the 8 cores I have now, and would rather have the i7 and DDR3 with a Quad as I feel it would be just as fast if not a little faster. I also plan on adding the 4870 in anticipation of the benefits Snow Leopard will add. Any help would be great (sorry again if this has been discussed, I've read some great threads here so far about the 2008 vs 2009 Mac Pros). I would love to be proved wrong though.