Best MacBook Air alternatives

Asus UX21
The UX21 was the first lappy announced under the new Ultrabook category. It comes in at 0.1-inches thinner than the Air, which we're pretty sure had the Asus design team high five-ing and air punching like a bunch of hyperactive kids. It may sound silly, but every millimetre counts. Apple's thinspiration even extends to the design, with its aluminium chassis, metal keyboard and glass touchpad. And now the Air has new Sandy Bridge Core i5 or i7 insides, they're almost identical in that department as well. The Air's Thunderbolt port trumps USB 3.0, though.