I am not a typical graphic designer but I own a graphic design studio and have all the work running on Illustrator, Photoshop. I need a laptop which can of course handle all the files, but mainly help me share new designs with a client. Am extremely confused on whether to go for a 13" or a 15".
Get the 15 inch, non-retina, with 1680x1050 anti-glare screen. Add RAM and an SSD yourself (with the retina this is impossible). It's amazing hardware, and with a Samsung 830 or Vertex 4 SSD and 16GB RAM, you'll be really happy.