Waited on getting an Imac till I saw the new macbook pros. Ill be using it for my itunes library, some gaming and like new games. Understand they arnt the best gaming machines but like the OS. So now deciding between maxed out Imac or maxed out 15 retina pro. Guess my question is how much better is the graphic card in the Imac vesus the new MBP? Thanks for any info. Guess im thinking of the Imac and maybe a used air or even the new ipad air for school. Or think better just getting a maxed out 15 to serve both purposes.?