I'm looking at a new computer for grad school as well as the heavy load of photography and music recording that I do, and I think I'm going to go for the mac pro over the un-upgradeable iMac. But, out of sheer curiosity, I'm trying to find out what sort of performance increase I will see coming from my current 1.42ghz G4 ibook. I know, lightyears. But indulge me. I've been trying to find a website that will have comparable benchmarks from both systems, and so far I can't find much. Does anyone know of a site that will archive bench scores of older systems, especially one where the bench test has remained relatively the same since my 2005 ibook so that I can compare it to the Mac Pro accurately?