Hi, I currently have an 2011 15inch Macbook Pro (2.2ghz i7 750gb). It was very fast for the first couple of years, but it has had a lot of problems lately, so I want to upgrade. I am trying to decide between the 13inch Macbook Pro Retina with 3.1GHz Dual-core Intel Core i7 and 500gb OR the 15 inch base model with 2.2GHz Quad-core Intel Core i7 and 256gb. - I am worried that 256gb won't be enough space. - The screen size doesn't bother me too much, as each has equal advantages and disadvantages in my eyes. - I can't afford to get the better 15inch. The main concern I have is that I want it to run super fast - I do part time Graphic Design work and I often like to have Illustrator, Indesgin and Photoshop open at the same time. Which processor will do this best for me? I appreciate the help!