I love me a good documentary. PBS Frontline
might be my favorite source these days. Most of their work is top notch, and they usually pick great topics.
Vice is indeed awesome, they make an excellent product.
A few other great documentaries that I have seen semi-recently. You should be able to find these on netflix:
Queen of Versailles
The Wild and Wonderful Whites of West Virginia (possibly the most insane shit i have ever seen)
The smartest guys in the room