I have seen most of the movies mentioned minus that Salo flick. Salo sounds god awful and Im not sure I would even watch that movie. Of the movies I have seen:
A clockwork orange was not that bad IMO, I actually like the movie and if any of you know the movie well you might just be able to draw some conclusions from it.
Seven was pretty bad it might be the worst of the movies I see listed, also another movie that I like a lot.
8mm was okay but not too disturbing, I never really got into it.
Saw was somewhat disturbing but I did think it was a pretty witty movie and thought it was good. The sequel was not as good but still decent.
Hostel had it's gory moments but I didn't think it was too bad. I liked this one.
I still need to see requiem for a dream, I may actually try and rent it soon. I keep hearing that I need to see it but always forget to watch it.
I will add that I think there are two movies that haven't been mentioned yet. Some of you may disagree but I think they are worth noting, and that is the rob zombie flicks. House of 1000 corpses and The devils rejects.