Questions.. What signifigance will 1 extra GB make? Are there any test numbers available? Why pay $575? Isn't it possible to get it cheaper? and finally When it ships with 2GB of ram.. is it 2 - 1GB cards.. thus leaving a vacant spot for an additional 1GB... ? I have 6GB in my G5 dual 2.5 Powermac and it gets bogged down when I have Motion 2 and FCP open at the same time.