MacBook Air for work (graphic design)

Reviving this thread since the MBA was slightly upgraded today.

I have an early 2012 MBP 13" but I really need -WANT- a MacBook Air for its portability, speed, etc. I don’t have plans to sell/give my MBP because it’s a great machine but I’m struggling with the fact that 11" may be too small AND another 13" may be overkill.

What do you guys think?