I have battled with getting a standalone e-ink device, but the variety of the reading content I need wouldn't work I think. Magazines, multimedia etc.. it's very appealing but also a bit limited for me. I'm going to actually wait and see how the Notion Ink Adam performs before making a decision.
U are correct, if you need media-rich media, e-ink is currently not your best friend. The iPad would do a far better job.
Like anything, all of them will evolve, adapt and improve. So who knows full-color e-ink with higher resolution could be just a few months away.