I've been offered a Power Mac G4 Quicksilver from a friend who's buying a new Mac. I know it's been well looked after and I think it's either the single 800mhz or 867mhz with around 640mb of RAM, 40gb HD. If I do take it off his hands, is it worth upgrading and what benefit will I see? I figured I could get two 512mb RAM chips and also perhaps a larger HD (though believe it would need an additional component to handle an HD larger than 120gb - is this correct?). It takes 1.5gb RAM max. So how much of a performance lift will almost tripling the RAM give me - will it be worth the $140 (approx)? Is it best to replace the existing HD or fit a second internal one? Do I need some sort of adapter if fitting a larger drive to any of the internal bays? I wouldn't consider updating the processor as I don't think that would be cost-effective. I am aware that this system won't run SL, but am interested for nostalgic reasons (even though it's only around 8 years old).