I'm thinking about replacing my 4 year old Air and have been looking at the entry level MB and rMBP. Both are the same price. I mainly use a laptop for web browsing, e-mail and occasional word processing. I don't need much storage and like the 13" screen on the Air. It might be difficult to go down to a 12" screen. So, if you bought the entry level MB I'm curious why you chose it over the entry level rMBP. Thanks for the help.