While the previous MBA might have felt like a compromise, I find the current MBA a top-tier contender for development, personally.
I use a BookArc Air from TwelveSouth[1], LED Cinema[2] display. I find it beats having 2 Macs. I love disconnecting my MBA, taking it to work and opening it up at the exact place I was when I last used it. The BookArc makes it aesthetically pleasing and organized and the MBA handles the Cinema display without effort. I also like syncing my iTunes library with my iPhone on one Mac.
I use a BookArc Air from TwelveSouth[1], LED Cinema[2] display. I find it beats having 2 Macs. I love disconnecting my MBA, taking it to work and opening it up at the exact place I was when I last used it. The BookArc makes it aesthetically pleasing and organized and the MBA handles the Cinema display without effort. I also like syncing my iTunes library with my iPhone on one Mac.
[1]: http://www.twelvesouth.com/products/BookArc_for_Air/
[2]: http://www.apple.com/displays/