[Pajamaman]

The Onyx Poke is extremely light, and will run Koreader. However, it is more money, and I suspect the screen contrast is not quite as good as the Kobo, though I might be wrong. And the battery life is nowhere near as long. It's open Android, so it does more, but less battery life, and it's lighter probably because of a small battery. The orange light on the Onyx is also redder (therefore better IMO). However, I doubt Koreader will run as well as on a kobo, though it does run. But you can run lots of other ebook apps on it.