I have a 13 imch unibody macbook with 2.4ghz core 2 duo that has a bad battery and has issues with the airport from time to time. I also have a iPad2. I was thinking about buying a macbook air 11" with 128gb hd or a retina display iPad or a iPad mini. I just do basic stuff and was thinking about something mobile. What do you guys suggest? I even thought about a 13 inch rMBP but not sure I really need that much computer.