Okay, so it's starting to occur to me that my 450 Mhz dual G4 Mac is a little underpowered for GPO. I can't afford another computer right now, not even a used one. The most cost-effective way to more speed seems to be a Giga Designs dual 1.4 Ghz CPU upgrade. I've heard mixed opinions about the performance gains that these CPU upgrades deliver. Have any of you used these, and if so, how much of an improvement do they offer specifically for GPO? Is it worth the money? Or should I hold off a little longer and save up for a new machine? Oh, and I have plenty of RAM, so it's not that. Thanks.