The 13.3" is 1440x900 which gives you a little bit extra screen space. Asus Zenbook and Sony's VAIO ultrabook both look really nice, also in the 13.3" range.

The 13.3" is 1440x900 which gives you a little bit extra screen space. Asus Zenbook and Sony's VAIO ultrabook both look really nice, also in the 13.3" range. I work primarily from my 13.3" screen in a wide variety of IDEs, you get used to it.