Why didn't you just buy a big ol' honking external monitor and hook that up to your Macbook?
I develop on a Macbook Air, and that works quite well for me.
I develop on a Macbook Air, and that works quite well for me.
But yes, this was what I thought. A nice monitor for ~£200-300 and you don't have to change a thing about what you do, assuming that for on-the-go, the 13" is just fine.