Hello. I currently own a 2.4 Ghz MacBook Pro, 4 GB of ram, 256 of V-ram. I have made the decision to upgrade to a mac pro tower for expandability reasons. I do A LOT of work with 3D models in Motion, Maya, Shake, and Cinema 4D. I do a little gaming through Boot Camp and I also use Final Cut Pro most of the time. I was looking for a little faster render times and encoding times. I do realize that this relies heavily on the processor but I noticed that rendering relied heavily on the RAM and Vcard. I was wondering about the NVIDIA GeForce 8800 (512Mb) because I don't think that the ATI Radeon HD 2600 XT (256Mb) is going to cut it. On the Apple website, there is an option to select one, two, three, or four HD 2600's. Would this essentially equal 1GB or Vram (256 x 4)? If so, could I do this with the 8800? (512x4=2GB) Is this possible to "add" the processing power together (much like SLI) or is adding another graphics card just for adding monitors? Answers would be much appreciated!