The only film that sprang to mind was 28 Days Later, that along with Shaun of the Dead reanimated the Zombie genre. Everything else seems to be bad remakes or torture porn at the moment. Stuff like Hostel in particular i wouldnt even classify as horror. It takes more than disgusting imagery to make something a horror film.
28 Days Later stands out as true horror, because it doesnt rely on shoving gore and tits at the audience. It actually has more depth - like the fact that its not the Infected that are the real monsters, its Christopher Ecclestons gang of thugs in Tatton Hall.