best NOSQL database for django?

i'm a php developer for 7 years and python for 3 years and using [mongo,cassandra] all the time
recently i just dived into django and i like it so much
but i'd a BIG BIG problem with reltional/SQL databases

i've googled for finding the best choice to start deploying django with an Nosql database but theres no official Django support for any NoSQL databse

i found MongoEngine very unhandy! actually i don't like it

what do you recommend?[on your experience]
i have no problem with any NoSQL databases