I have rescued a nice working G4 mystic. its got 10.4.11 on it, 1 Gb ram, stock hard disc. I modified my spare radeon 9700 pro PC to a mac version and put that in. And added a DVD burner and enabled it. current processor is a G4 Dual 450mhz. I was wondering what options I ahve got as regards to upgrading that. I seen a few on the internet such as ebay, like an 800mhz dual etc etc. but was not sure if this would work or not. any help would be kindly appreciated, as i've never really owned a mac before so for me to understand as much as i have done thus far is good going!