I am a PC users for almost 10 years now, but now I interested in switching over to the Mac. Right now, I have a 1.2 GHz AMD Thunderbird / 512 MB PC133. (I bought it 3 years old). What do you think the iBook 800 MHz G3 is a good upgrade from my previous PC? I also read about this MHz Myth between x86 (Intel and AMD) to the Power PC (G3 and G4). According to Apple a 800 GHz G4 perform like a 1.6 MHz P4-M, so does the iBook 800 MHz G3 perform like what? exactly a Celeron? Duron? Transmeta? PII?