Hi guys, I recently decided to purchase a 2015 model MacBook Pro. I want portability since I do lots of my work at school yet I also crave for performance. I'm having a hard time deciding which one to buy, 13 or 15. I like the 15 inch screen which gives more space and god the screen is fantastic. I don't play games and edit videos. May photoshop pictures from time to time. I know I'm not qualified as a heavy user but the extra 2 cores and more powerful GPU sound satisfying. I was looking at the old specs for 2015 models on Apple's website and for 15 inch model, I didn't see the dual video cards as an option listed which is not on the configuration page either. I was wondering if Apple has stopped providing dual video cards for 2015 15 inch model. I'd very appreciate any suggestion and also the clarification on the dGPU issue. Thanks a lot!