Hi I need a laptop and my iBook won´t do anymore. It will be used on location to back-up HD footage using the ExpressCard slot, and some editing. (Main editing will be done on a MacPro.) I have an 2.16 iMac that I have used happily for 2 years, editing HDV, photos etc. Will I notice any performance increase (or decrease) if I trade in my iMac for a MBP. (I´m considering the Classic MBP, because of 2 Firewire ports and I think it looks better and it is cheaper. I need to sell my iMac to pay for the MBP. Will I miss it? I figured I could always get a bigger screen later, but how does a MBP perform compared to an older iMac?