Toshiba Kirabook (2014)
Kirabook 13-i7s-touch Ultrabook
A new CPU and much-improved battery life make the Kirabook easier to recommend.
Apple MacBook Pro with Retina Display (2013, 13-inch screen)
The 2013 13-inch Apple MacBook Pro has a super, pixel-packed screen, looks great, has good battery life and gives you a healthy boost of power over the MacBook Air, without bulging out your backpack too much. It'll set you back a pretty penny though.
Acer Aspire S7
At 11.9mm, the Acer Aspire S7 is incredibly slim and looks fantastic in its crisp, white suit. The addition of the touchscreen means that navigating through Windows 8's big tiles is delightfully simple. Sadly though, its performance, while good, isn't as blazingly fast as you'd hope for considering the high price.