I think I have exhausted the possibilities already, but I'll toss out my question anyway.

I am interested in an e-ink reader because these have outstanding multi-week battery life. I don't need color capability and will not buy a 'smartphone', but I do read books and if I could view PDF map files and documents that would be good, too. However, I would dearly love some audio support to accompany the e-ink display allowing me to bring music along on the same device. So far I cannot find any e-readers that have this combination. Does it exist?