i have a macbook pro 2.2 GHz 15" and am using it to edit a film shot on hd (108024A) and am getting tired of the small screen size. i am considering either selling it and buying a 17" or buying a cinema display external monitor. i am leaning towards the external monitor but am concerned that the macbook pro won't be able to handle both a feature film in final cut and exporting an image. is the macbook pro processing power up to give me a good resolution on the external monitor (as good as I would get if i hooked up from a desktop). also, would the computer give me the wheel icon to wait more often because it has to do extra processing?