Hi I am using a trusty old PowerPC G3, with 900MHz processor and 640MB RAM, running OSX 10.4.11. Its going ok, but can be a bit slow. I have been happy enough, but when researching to buy an iPOD its clear that I need to upgrade the OSX to 10.5.8 at least. Is it possible and worth it or would I be better off upgrading the machine and getting one with a newer version of OSX? If so, as I prefer desktop machines I'd been thinking of a G5, but I wouldn't want to upgrade again for another 10 years or so, so would want that to be a good option! I'm using it for writing, research, photos, internet, but not for design. Any suggestions, comments or recommendations? Many thanks!