About to order dual G5, but not sure about ATi 9600. Upgrading form G4 350 with Radeon 32mb PCI. (yes, pretty crap for modern gaming I know). Will the difference be noticeable enough or should I stretch to the 9800. Alternatively would it be wiser to go with 9600 for now then upgrade the card in the future, possibly a 256mb card when they become available.