Hi, I'm new in the forum. I read many posts, but i wanted to open a new post for my decision. I want to buy a new macbook, it will be the 1st for me, I will buy the mac for programming application (xcode, corona sdk and android sdk with related IDE and text editor) and some graphics editing. I'm confused about the decision I have to take because before the new macbook pro late 2013 came out I wanted to buy the mac book air i5/8gbRam/512gb ssd because I need to utilize an external monitor, so I can't buy a thunderbolt external hd. After I read the macbook pro issues (lag) with retina display on 13" I'd have chosen the macbook air but there is another problem because i have a doubt: it's better i5 or i7 on MBA same config for both (8gb ram and 512 ssd)? Is really true the problem with temperature and fans accellerator? Difference about battery life between both processors? Thank you so much for answer