During a few days of bachelorhood several weeks back I watched 300 (2007,R) (ScreenIt! Review).  From ScreenIt!:

A Spartan king leads his small, but fierce army into battle against the immense invading Persian army.

I liked it OK.  Didn't care for all of the violence, but what could I expect given the subject matter?  I'm curious about which aspects are realistic.  Wikipedia has some discussion of that subject.

I give it 3 out of 5.