First off what is the difference between a G4 and G5? What is all this "dual core" stuff about? Does the PowerMac G5 physically have dual processors, is that what dual core is? Has there been any talk/speculation about a G5 notebook? I ask because the G5 desktops at Fry's Electronics seem allot faster than my G4 mini and I'm considering getting rid of my Dell notebook and upgrading to a PowerBook but I think I would be disappointed with a G4. Does Apple offer a special warranty for their PowerBooks similar to Complete Care that Dell offers? Something that covers accidental damage?