I currently have both the Quad 2.93 and Octo 2.26 mac pro 2009. I'm going to be doing work from a remote office for 6 months and am only bringing one along. The Quad has 8GB RAM, the Octo has 16GB RAM - used for Photoshop, lots of VM, and office tasks. They both have dual Velociraptor Raid 0 for boot and 1 VR for Vista X64. -- What one would you pick if both on a table and you had to grab one before leaving? My other one will stay home for my wife to use. Thanks.