Sony PRS-T2 is really popular in Europe. If you haven't done so, maybe you should have a look at the new PocketBook eInk readers, too.
I've seen both in a store, and the PocketBook reader looked really good. But they don't have special accessories for this PocketBook device.
I think Kobo is nice because it's so popular in Canada and France. From what I've read, Sony or PocketBook might be a better choice. But I'm not really sure about this, I haven't seen a Kobo myself yet.