Now that there's Kindle for PC, the best Kindle partner is a Netbook, I think. The reason is that you can use a mind-mapping program such as Freemind to take notes, use a browser to browse, all while reading the text. I use it with Wine; right now I'm in Linux Mint reading my Kindle text and doing other stuff. I'm on an EEE PC 1000h. My tablets don't work with Freemind, and I don't find Labyrinth adequate, and besides, there isn't quite enough room to use a mind-mapper happily on a tablet. And you can't use Wine on a tablet, so you can't read Kindle stuff.