Sorry for another one of these threads, but I'm having a tough time making a decision. I've found a used early 2009 Mac Pro 4,1 with the following specs: 8 cores at 2.27 GHz 12 GB RAM NVIDIA GeForce GT 120 512MB (Isn't that pretty bad?) 1 TB+640GB hard drives for $2099. These things are getting high 11,000's on Geekbench, which is slightly lower than I would expect a spec-bumped high end iMac to be after the expected update with ML (at least that's what people on the iMac threads think now). I'm a student and would be using it primarily for motion graphics. Any motion graphic designers out there that can give their opinion on the better speed and the screen of the iMac over the upgradability of the Mac Pro? I'm fairly concerned with the graphics card in this machine and viewport performance in Cinema 4D. I wish that I could afford a better machine, but my budget is $2250 or less and I need to buy a new computer soon. Thanks!