I swear I'm not trying to spam here, just bringing it up as a possible solution to your question.
The Asus Taichi might be something worth looking into. Not exactly sure when it is set to come out, but it's like taking a Zenbook and adding a tablet on top. I know it can be difficult to evaluate a product that hasn't been released yet, but it may be something worth keeping an eye on. About a week ago I got to play with an advance model for a few minutes, so they can't be too far from hitting stores.