Asus Vivo Tab RT

The Vivo Tab RT starts as a standalone tablet, but transforms into a hybrid device with a keyboard dock in a $599 bundled deal. It has a lot in common with the Surface RT, as both devices run the Windows RT operating system, which we find to be somewhat of a kludge compared to the full version of Windows 8. The unit sports a 1366-by-768 display and a quad-core Tegra 3 processor, just like Surface RT, but adds a much better camera to the mix. And thanks to its smaller screen size (10.1 inches versus 10.6 inches), the Vivo Tab RT weighs a bit less than Surface RT--1.3 pounds to Microsoft's 1.5 pounds (keyboards not included, of course).