Hi guys, I have a powerbook G4 1.5GHz super drive. And it's getting kinda old, I can't even use iPhoto smoothly, and I am looking into upgrade. Two question: Just how much more performance advantage can a MacBook offer over my current setup? If there is any real life examples that will be great. Also, I am not going to school no more, so I don't have to have a laptop, is iMac perform much better than MacBook? Or MacBook is enough? Many thanks.