Of course it is your choice and it might be the completely correct choice based on your usage. But considering the rMBP also gets the $100 price drop that the 2013 Air got, a rMBP 13" i5/8/128 would be $1399 and an Air 13" i5/8/128 would be $1199 so it's only $200 difference.
For that difference you'll get a better processor, better graphics (if they go with the Iris Pro), better screen and, if Apple doesn't make it thinner, slightly less or same battery life as the Air even with the better processor and better screen due to more battery-space.
As said, your choice and the Air might fit you better but I will definitely wait and see what the rMBP update brings!
That is an option, if I would have the money and if this price drop would actually happen, which I don't expect.
I don't even know if the 13" pro will be getting Iris. The 13" never got a proportionally better graphics card than the Air, just a higher clock speed CPU.
On top of that is the fact that I want to get the MBA in the BTS and before my year starts. But that's just my inpatiency lol