I’d say stick with 15”.
I tried designing on a 13” Air and then on my 15” MBP and the difference is noticeable. The extra 2” just gives the needed screen real estate when in PS.-Scott
I don’t understand this, since the 13” Macbook Air which I’m on has the same resolution as the 15” Macbook Pro. Unless you upgraded to the higher resolution screen when you bought it maybe? Either way, don’t think you can go wrong with either choice.
Looks like my requirements could be met: http://www.marco.org/2012/03/28/ivy-bridge-schedule