i've decided i'm going to buy a new used laptop, mostly what i'm going to use it for is DVDs, internet, chatting, and some light office work (i've got office X), i have my own legit copy of panther, so the OS/software isn't too important. the things that are important are that it's quiet and runs cool, the dell laptop i use now can get pretty hot, because i use it on my lap a lot, so i'm looking at a dual USB iBook for $400-$500, a pismo for a similar price, and i've found a 500MHz G4 powerbook for $550, what of these three would be the coolest and quietest and still be ale to chat and run movies well? thanks a lot