I'm buying one of these models, but I'm not sure which to go for. If I get the 2.3 retina I will be upgrading to a 2.6 processor when I buy it. If I get the 2.6 classic I will be upgrading to the high res screen. I've heard that the retina has a faster graphics card, is this true? And I know you can't upgrade the retina model so I'm not sure about the retina one. I'm looking for advice from people who have maybe tried both, and people who have had experience with the retina model as I keep hearing on here that there are many problems with them. Regarding usage, I'm a graphic designer so I will be using illustrator, indesign and photoshop all at the same time, as well as a few browser tabs, mail etc.