So before you say 15" this is the deal. I'm trying to spend just around 2,600$ so I've decided that if I buy a 13" I'll up the processor to the 2.9 i7 and get a 512 ssd. Or I could spend around the same with a 15" and get 16 gb of ram a 2.6 i7 and 256 ssd. The big difference being the storage space and the discreet graphics card. I don't do a lot of graphic intensive work so the only reason I considered the 15 is mainly since the retina display demands a fast graphics card to push all those pixels. So to all those 13" retina owners, do you notice an issue with graphics or speed because you don't have that INVIDIA chip. I don't play games on my Mac so it's really a matter of longevity of the computer.