Personaly I would go for a tablet PC in that case. More expensive than some of the Kindle devices or its alternatives, but you can do so much more...
All the Kindle like devices are monochrome at best. Except for one exception: for the Japanese market there is an Kindle alternative, the FLEPia from Fujitsu, that also features a color screen, etc. But it is rather (way too) expensive...
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