is it worth it? Will everything run well? My iBook G4 has 512 MB RAM 1.07 GHz ...i want it because i cant do anything with the version i have rite now. I cant use iTunes for my iPod Touch, get Limewire, run a whole bunch of programs. I want to do alot of stuff with my ibook but i cant. The software is 10.3.9. I thought about getting 10.4 thinking it would be cheaper but its the same price...please help. How would you rate the 10.4 compared to 10.5?