I am deciding if I should return my best buy macbook pro 15 inch that I just bought last week. There was a deal for 200$ off and another 10% coupon. It brought it down to 1600ish before taxes. Loving the real screen estate but debating if I should get the newly refreshed 13 inch rmbp with the longer battery and the new tech? I'll mainly use this as a main notebook for my graduate program. Advice? Im leaning towards to just keeping the 15inch, but not sure if I'll have buyers remorse.