Amazon kindle fire is your other shortlist option. Amazon put all your reader notes onto a personal web page for easy access, and they have lots of optional dictionaries. But you are now moving to azw / mobi formats to use the amazon world. You also get their unique x-ray facility for most, not all books.
They may limit size of any one highlight, note....
you can actually run mantano premium on KF but it needs a geeky maneuver of
buy on some other tablet, then sideload to get around amazon store restrictions ( they don't like the competition). they don't allow google play store either - another potential showstopper for you. I'ts a lovely tablet though.
and there's this: ( link to evernote)
http://lifehacker.com/send-your-kind...-to-1603016995