I have already told you that with a Wacom touch screen you have to use the stylus. However, balanced against the high accuracy of the Wacom touch-screen, and the fact that, being "behind" the eInk screen, it doesn't affect the image quality, as the Sony's "resistive" touch screen does, this is, IMHO, a small price to pay.
Bear in mind, too, that with the DR or iLiad, you don't NEED to be able to drag the PDF around to be able to view it - you can see the whole page at once.
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