That's a tough call. If this was going to be my only and everyday machine, I'd go for the 13" Pro with the Retina display. The processor is faster and I could l

That's a tough call. If this was going to be my only and everyday machine, I'd go for the 13" Pro with the Retina display. The processor is faster and I could live with the extra weight. If it's a secondary machine, I'd go for the Air for the portability and battery life.