Okay, I bought an 20" 2GHz iMac for college a month ago and have been totally enamored with it ever since. I love this thing to death. Only problem is that I have no portability(sure I can take it home, but to my required study hall hours for athletics? I think not). So I want to buy a used or refurbished iBook to use solely for internet access and typing documents, nothing strenuous, because my iMac tackles anything big. I just want the computer to be able to handle the light work easily. I have been looking at TechRestore.com, seems like a reputable and easy to use place. (as well as Ebay, which my mom is rather fond of, but I'm a skeptic about such things, lol. Also, if anyone has recommendations for low prices Mac resellers, let me know!) So, my main question is how big of a difference is there in processor speeds between an 900 Mhz G4 and a 1 Ghz G4. Would it even be noticeable? I wouldn't think so, but it seems as though the prices are severely different between two similarly spec'd lap tops with these processors. Also, how much slower would a 800 Mhz G3 be? Thanks!