Hi, I want to get into app development, I don't own a mac at the moment so this will be my first one, I was wondering what would be best & what kind of spec do I need? My budget is about £1500 max. I was thinking about a 13 inch 2.8Ghz MBP, but would a 13 inch air do as a good job? Anyone had a Experiance programming on a variety of machines, what would you recommend? Thanks.