IMHO, at the end of the day, what matters is your satisfaction.
We can all quote prices, benchmarks, and reviews, but none of those things really matter as long as you like/don't-like what you are using. As I said somewhere else, all opinions come with a certain amount of unavoidable bias. Sometimes, you just have to trust your own judgements and opinions!
That's why some people can be happy with less modern processors/technology (example: all users in the "PowerPC Macs" forum), while others need to have the latest tech. It all depends on what you want to use your Mac for and what is good enough for you.
If you really think you need the next retina MacBook Pro, just return the MBA and wait for the rMBP.
Just don't regret the machine you purchase, because you are paying (hard earned) money for something that is meant to help augment your productivity, quality of work, and personal development.