I have a budget of $2100 for a macbook and I can't seem to choose between these two configuations: 13in: 2.8GHz Dual-core Intel Core i7, Turbo Boost up to 3.3GHz 16GB 1600MHz DDR3L SDRAM 512GB PCIe-based Flash Storage $2059.00 15in: 2.0GHz Quad-core Intel Core i7, Turbo Boost up to 3.2GHz 16GB 1600MHz DDR3L SDRAM 256GB PCIe-based Flash Storage $2079.00 The flash storage on the 15in will be short but I figure it is expandable later with an external hard drive. I carry my computer everywhere, so portability is definantly a cause for concern. I do not however like to wait, speed and multitasking are important to me. I like the size of the 13in and if I could get the processor of the 15in in the 13in would rather have the 13in. I'm a computer science major, that being said I spend most of my free time on my computer and I don't want to make the wrong choice since i've been saving for a while. So i'm stuck, want the size of a 13" macbook pro (even better in size and weight is the macbook air!) but the power of a 15" macbook. What would you do in my position?