To state my usage are mainly photoshop, illustrator, after effects, and coda. Portability is not that of a big issue since i'm going to buy a 13.3". I would like know if an air can handle all my required needs or if i need to buy the pro retina. Also i would like to know the specs i would need to buy to last for about 3-4years without buying another. I already have a imac for my main computer. This is for my second option when i'm outside. Thank you.