I'm a full time working photographer (use Canon 5D MK II's, 1DS III) and need a mobile device (MBP 17") for editing in Apple Aperture 3, Photo Mechanic, and some Photoshop CS5. Which processor is ideal for my type of work? i5, i7..... I already have a high end Mac Pro and an i7 iMac for most of my work in the office. This is mainly to do some editing at a Starbucks when I need to get the hell out of the office. Any suggestions would be appreciate it.