Have you seen the a Dario Argento film. Suspira, Creepers, and especially Tenebre. Those are great horror and scary movies that have influenced all the great directors. Especially William Friedkin, Romero, Taratino, Craven. I think all these guys were influenced by Argento. I recently got DVD collection with all of his best films. It definitely includes all the ones I mentioned and like two or three more

http://www.youtube.com/watch?v=kc_ZiWHFbnQ

http://www.youtube.com/watch?v=R5wKppxpwK0