Hi everyone, Just received a 2013 i7/8GB/512 macbook air. Paid 1525 WITHOUT applecare but just realized a few things: 1. could have gotten it in Deleware (30 mins away) tax free 2. could have gotten brand new 2014 for a similar price since I am a student and now know to buy from deleware plus I wanted to add applecare I am a dental student and usually have about 20-30 internet tabs open with about 12 pdf files and a few MS office/ppt files open at a given time. I also need to store over 150 gb and counting of school material on my laptop. They must be with me at all times. I also must have a patient database program that houses all patient charts and xrays so I can access them. I use the laptop 12+ hrs a day. I do watch a lot of movies in the little spare time I have. I really need a long battery life as my classes run from 8-5 with very few charging outlets. should I just return this refurb one and get a 2014? Also should I get an i5 or i7- I keep hearing that the i5 is better on battery life. My main concerns are speed (I must work efficiently and fast) and battery life and weight of the laptop. Thanks for any help!