It is not easy to answer which ORM should you used. It depends on the data model I feel.
I avoid ORMs which forcibly try to get ownership of the data model and data structure. They are only easy to use for greenfield projects, IMO. But who is still choosing databases for greenfield projects where ORMs are required to tame the query beast?
Not long time ago I used waterline.js. I've not really used but think these ORM good choices too JugglingDB and Osmos.
The ORM I love and use the most right now is Thinky (For the super cool RethinkDB). It adds only as much sugar as needed. The rest is up on my knowledge. Great!