The Asus Zenbook UX31-RSL8 is the clear leader in the budding ultrabook category, with better overall performance and battery life than any competitor. PCMag PCMag.com and PC Magazine are among ...

At 16mm of breadth it's a little on the chunky side compared to the Acer Aspire S3 and the Asus Zenbook UX31, but it weighs a light and airy 1.1kg – the lightest of all the ultrabooks.