The Cybook Opus is not out yet and the price that is suggested is 350 dollars. I saw a 1 minute french made video of it, and it does look cute, looks like a cool device.
I think if it was priced about 150-200 like the jetbook, it would sell but if the price is 350 , seems kinda high. My 505 cost me 150 dollars with sony deal, even though the 505 sells for 279 dollars retail , I know I wouldn't buy it at that price. I mean my 505 and netbook together cost 350 dollars. But you are looking at speciality item and of course it's gonna be high when it first comes out. That is why I went with the 505 because it was at end of cycle and price came down. Since you are gonna do straight linear text, any of these devices should work for you.
I like the small size of cybook opus, user replaceable battery, fast page turns, 1 gig storage, but without reviews out on it and user reviews, if it was me I would want to get a reliable one with good track record. Even the kindle 2 is only 299 now. But if putting it in your pocket is important to you, the cybook opus it is.
p.s. On there website it states 280 price plus 25 dollars fedex shipping, total price 305
http://www.bookeen.com/shop/productd...?ProductID=445