I think the MBA has come a long way when I got my 13' Core Duo MBP I looked at the air but it was to expensive and limiting so I went with the MBP.
If I were to up grade my MBP in a year or two then I really would look carefully at the Air. I really use my MBP as my secondary computer. I have an imac at work and a beast of a PC desktop upstairs to play games, have music on etc. and with iCloud I could have my music on all of my devices.
I am a gamer so I wont be abandoning windows any time soon but I have moved my work to the imac and am loving it. Apple has improved its gaming a lot but window is still the superior OS in this regard. (Runs for cover from the macrumors crowd picking up pitchfork!)
If I were to up grade my MBP in a year or two then I really would look carefully at the Air. I really use my MBP as my secondary computer. I have an imac at work and a beast of a PC desktop upstairs to play games, have music on etc. and with iCloud I could have my music on all of my devices.
I am a gamer so I wont be abandoning windows any time soon but I have moved my work to the imac and am loving it. Apple has improved its gaming a lot but window is still the superior OS in this regard. (Runs for cover from the macrumors crowd picking up pitchfork!)