I got a 15" 8gb 25ggb refurb from Apple to try over easter, now me and my daughter have fallen for it. It will be a buss machine but for her to use as well. I have found a 10% off deal and 18 months interest free so am going to get a brand new one. I got 5 years out of my last pc laptops. I have found the 256gb is a bit restrictive have used half and haven't put parallels/windows and a virtual of my old pc about 80gb on it, so wouldn't have much left. For $600 more i can get the 2.7 16gb 512 gb which is nothing over the 18 months. My 2 questions are: 1. The 2.7 16gb 512gb will be alot faster right? 2. Will it be hotter though? cheers, only have 4.5 hours to decide.