I've been thinking about upgrading my RAM in my mac pro from 8GB to 16GB but I have a couple questions: 1. I'm using this computer mostly for FCP 7, CS 5 (mostly photoshop) and Aperture, as well as Logic Studio and a few other misc. pro apps. Will I see that much of an improvement in speed by doubling my RAM and is the extra speed worth the $200-400 the upgrade will cost?? Doesn't FCP 7 only support 4GB anyway? 2. Right now I have 4x1GB cards and 2x 2GB cards installed, so I have one free slot. Am I better off buying a pair of 4GB cards to fill the last spot, or would it be best to trade in my chips and get all 2GB cards, or perhaps 4x4GB? More RAM on less chips is better, right? Are 8 matching chips better than mismatched chips of the same total capacity? Thanks!