I might add that Pocketbook Global (see the Pocketbook forum here) also, as a company is very oriented toward the education world back in Ukraine. So maybe look into their newest large format readers. I would suggest the 903 as it has a touch interface but I really have not done more than a fast look over the videos and such. So who knows, but they really are out to crack that education and research tool world.
Devices like the iPad will eventually evolve into great tools for the purpose, it's pretty much a no-brainer as the developers get better with coding for the OS. I see the Kindle as eventually getting there as well once they get their API and developer program fully up and running. Of course there are others which will eventually get there but your needs are NOW not when and if sometime in a fuzzy future.
