Pondering some form of e-Ink #ereader and am looking for recommendations. Ideal featureset:

Screen: ~7" - don't like holding a 10" iPad, and an expired 6" ereader seems a fraction small.
PPI: >~300
Wifi
Ability to sync to/from CalibreWeb

I'd rather not pay Amazon for their products so that probably excludes the Kindles unless they are outstandingly worth it. Thoughts?