Another option similar to the Asus you linked is the Lenovo... not sure what it's called, but it's a similar 10" tablet.
I have used the Asus. While I don't like reading on anything like that (I still rather deal with E-ink, despite the smaller screens of current touch-screen devices), one think I really appreciated was the functioning remote desktop options in Windows7 (yes, yes, XP and Vista too, but W7 really made it so much more useful and user-friendly). When on the road, I can remotely access my desktop at work and have a fully working machine at my fingertips - running SAS code on my 10Gb+ datasets from a tablet is, frankly, priceless.
To be fair, the iPad has some remote desktop apps as well, but they are not as user friendly - especially when interfaced with Windows - as a straight W7 to W7 remote desktop solution.
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