About to purchase my first Mac. I prefer the 13", but will consider the 15" if the 13 can't handle what I want to do. I plan to use this for: Basic iMovie editing Basic iPhoto/Aperture editing Netflix viewing I don't play games, etc. Will the dual core processor/integrated graphics on the 13" get this done? I assume so, but someone who knows for sure please set me straight. Thanks in advance. Secondary question: I plan to run this to a 24" external monitor via HDMI/DVI. Does that change the answer?