My old dual G5 2.0ghz will be due an upgrade next year. I currently have 2x30" acd's to which i would like to add a 3rd. So when speccing a new mac pro do i opt for the 3 x NVIDIA GeForce 7300 GT 256MB or is there another better combination. My work consists of 3D modelling and architectural rendering. On a slightly different rant i will be sad to go non ppc. My powerbook G4 is still solid and gets the job done i'm not really part of the crazy upgrade gang sometimes i hanker after a quad G5. As i understand my mac now is pci-x not pci express so i don't think adding another card to my existing unit is possible ?