Are both a full featured object model, and an SQL database really essential for that kind of site?
I essentially share the same SQL, OO, ORM hammer, as you, so I would likely use the same solution.
It may be that all 3 complex technologies, the database, the object model, and the ORM are unwarranted by the low load/crud problem.
I also know that there is very little value in me writing a new set of CRUD queries for a low-load site when someone else has written a well-debugged interface for me.