Help Me Find a Macbook Air 13 Competitor

I don't want to do it. I really don't. But I'm actually considering getting a Macbook Air 13".

So help me, please, find a laptop that matches it on chip specs (or closely enough), battery life, and overall form factor (love that slimline).

I'm completely at a loss. I've considered the Vaio Pro and Duo, but none come close to the 12 hour battery, which could be due to the higher rez screen putting additional strain on the GPU, thus shortening the battery life.

Help me find something that balances these in a form factor that resembles (or beats) the Air.

The factors for my purchase are:

  1. Price
  2. Battery life
  3. Compact form factor
  4. Build quality

These should *all* be comparable to or surpassing the Macbook Air 13".

EDIT: Because this seems to be a common question, let me clear up why I said "I really don't want to". I don't hate Apple or their products, I hate the lack of upgradability and user accessibility to the internals, which would make replacing or fixing components come down to taking it to an Apple store and having them repair it. This is not a problem for most people, but it sort of leaves me at the mercy of Apple, not to mention that I'd have to be okay with a max of 8GB of RAM for the rest of my time using an Air.