Ive had a runaround with Apple the past few weeks just trying to purchase a computer on my Apple Barclays Rewards cards. I now have 2 machines, the 15" 2015 Base rMBP and the 13" rMBP 2.7 GHZ with upgraded RAM to 16GB. Which will be better for long term? I understand with the 15inch I am getting an upgraded graphics card though not dGPU and a quad core vs a dual core. I am coming from a 15" 2011 MBP. Would you recommend returning the 15" or the 13"? I do a lot of web surfing, google hangouts, Skype, Microsoft Office, but I am looking to get into some computer science programming.