Elijah Wood plays a mannequin owner who moonlights as a serial killer. I know this is a remake of an 80's film, but this one was so gory and out there that I couldn't help but love it.
2) I Saw The Devil
When a serial killer murders his fiance one night, a man decides to take justice into his own hands. Only instead of murdering the killer himself, he tracks him and continuously beats him down, lets him live, then waits for him to try to kill again so he can rinse and repeat. It's a commentary on who's becoming a monster. It's hard to watch but fascinating.
3) 30 Days of Night
When a town in Alaska enters their yearly month with no sunlight, a group of vampires take the opportunity to wreak havoc on them. I read the graphic novel as well and I enjoyed this film. It's beautifully shot and you can never go wrong with Ben Foster.