The Lenovo Yoga Tablet 2 with Windows is currently available for $369, and offers a high-resolution display, and fairly speedy performance in a svelte package. The cylindrical battery can rotate, to reveal a kickstand that'll prop the device up.
The tablet is bundled with a keyboard dock. The keyboard is great: spacious keys that aren't too shallow make for a fast, accurate typing experience.
But the keyboard docks to the tablet by way of some fairly weak magnets, so it's not very secure.
If you can find a flat surface, you'll have a lean productivity machine. The tablet has an attractive 1,920x1,2000-pixel display.
With kickstand deployed and keyboard attached, you shouldn't have trouble getting work done.
If you'd rather not break out the keyboard, you'll still have a Windows 8 tablet.
The hinge rotates freely, so you can angle the tablet however you'd like.
There's an 8-megapixel camera, but it's not very good.
The tablet's bulbous battery makes it easy to carry, but the weak connection between keyboard dock and tablet makes me nervous -- watch out if you're using the dock as a cover.