Since I don't have cable in my dorm, I like keeping up with cable shows via iTunes. Anyways, what apple processor (in a laptop) can handle iTunes videos easily? I have an iMac G5 (isight) which does fine, but my G3 ibook can't open them. Since I'm studying abroad next year, I need a better laptop than my slow G3. Can G4 powerbooks or ibooks handle iTunes videos? Thanks (and if someone could post the minimum specs for iTunes videos, that would be awesome)