I have a 2011 11" MBA with the i7 CPU, and I'm having thoughts on replacing it with a 2013 11". I'm worrying about the i5's processing power, and I have a hard time finding comparison data. I do some Photoshop, Indesign and some xcode coding. Thinking of an 11" i5/8/256 instead of my i7/4/128. How would the CPU perform, and if anyone could give some general comments I would be glad. Thank you.