Forget the Surface RT
Get one of the Atom based Windows 8 tablets out or coming out soon.
They are more expensive for sure (which is really a bummer), but they are full x86 compatible, where the RT systems are not. Many of them come with dockable keyboards as well - basically making them a convertible laptop - part traditional laptop, part tablet.
For full disclosure reasons, I worked on the the graphics driver for the Atom based Windows 8 tablets