Best ultrabook for business has yet to come?

So I am looking for an ultrabook for business use.

It must be light and thin, the battery must last more than 8 hours, and has a anti-glare screen.

Since Excel doesn't work for Mac, I have to exclude the new Macbook Air which is really a nice computer coming at good price. (It doesn't have anti-glare screen as well.)

Carbon X1 was a very good choice, but I heard that the battery only last for 3.5 hours? And there is still no upgrade to Haswell.

What is your No.1 business ultrabook choice? Share with me and thank you very much.