I will +1 the other posts suggesting the ONYX BOOX. I had a rM2 and now have a Boox Tab Ultra (as well as a Mac and iPad pro). I posted an extensive review in this group between the Boox and the rM a few months back (probably searchable).
For just notetaking the rM would work for you 100%; but your mention of ereader needs and Zotero puts your use case closer to mine. I don't use Zotero, and don't see an Android client app for it (yet), but can say that ereading/markup on the Boox tab ultra is better for me than when I had the rM.
I will +1 the other posts suggesting the ONYX BOOX. I had a rM2 and now have a Boox Tab Ultra (as well as a Mac and iPad pro). I posted an extensive review in this group between the Boox and the rM a few months back (probably searchable).
For just notetaking the rM would work for you 100%; but your mention of ereader needs and Zotero puts your use case closer to mine. I don't use Zotero, and don't see an Android client app for it (yet), but can say that ereading/markup on the Boox tab ultra is better for me than when I had the rM.