Well the forums on
imdb often have some very good posts on them, with interesting observations and interpretations of the films, and you will get a wide variety of opinions.
Unfortunately getting at all of this good stuff is a lot of work: There is just a huge amount of flaming, trolling, and just general moronic behaviour which goes on on all of the forums. Which is a complete pity really.
EDIT: Oh, and I second Charlatan's suggestion to start a thread in Tilted Entertainment; you'll get lots of interesting opinions and you won't have to wade through masses of infantile flaming!