I want to thank all of you who have contributed to this forum. Based on the comments made, because I am on a tight budget, I have ordered a quad 2.8 ghz, 320g drive, 2gb ram, ATI 2600 card. Also bought additional 4gb ram. Reasons for this configuration are statements that quad is very fast, and Barefeats tests showing 2600 card faster than NVIDEA 8800 card for programs based on Apple graphics core. The 8800 appears to be faster for games, but I don't play them. I am using the MacPro for Microsoft Office, Firefox, Aperture and Photoshop. Also use Fusion to run Quickbooks and a variety of important PC software not available on the Mac. QUESTION: Statements have been made regarding a "boot disk". I now have an iMac so I am not familiar with a boot disk. Do you load the applications on a boot disk and the files on another? I plan to get a Robo when it has a firewire interface. It would serve as my Time Machine back up and file storage. What would you recommend?