I'm going to be selling my old 15" from 2008 for something a little more updated. Originally, I was intending to get the new 13" with retina display, second off eBay. However, now I'm looking more towards the Air 13" for it's slim design and better battery life. However, my main contention with the Air is that it's not as powerful as far as CPU goes. I"m not going to be doing anything massively CPU hungry, but the next time I upgrade is probably going to be another 5 years from now, so I need something that'll be able to cope with using software like Adobe suite (PS and Audition), statistics software like R. I do a lot of browsing with multiple tabs open, so 8GB RAM is essential. Should I be considering the Air at all for it's weaker CPU (is it noticable), or should I futureproof myself with a more powerful MBP 13" which is a little more bulkier.