Horror Movies

I think right now my favorite horror movie is House of Wax or Rob Zombie's Halloween. But, I want to get into more of the 'classics'. Right now my list is full of house of 1000 corpses, and Jeepers, and all the freddy v Jasons, shit like that. But what are some of you guys favorites? doesn't just have to be horror either; it can be Halloween-themed or slashers too, i like slashers.