Hello there, I would like to know if with the integrated graphic cards of the 13 inch, is it enough to use as a main post processing machine connected to an external display. I am buying this machine for the next 4-5 years. In a way, I think the 15 inch would be better, but with the money saved, I could buy a nice monitor. (currently have dell u2312hm)! We don't know yet if the 13" will allow 16GB of ram. Is 8GB enough for the next few years? what about processor speed vs 15" (quadcore)? Of course, the 15 will have a faster graphic cards too... Dilemma..