I strongly recommend Christopher Smith's, Triangle (released on DVD in 2010, thus making it my favorite film of that year, stealing the top spot from Inception).
I also suggest Ti West's, House of the Devil. It's a delightful throwback to horror movies of the early 80s'. It's shot on 16mm film stock and even has old school credits.
You could also do the original Fright Night from 1985, seeing as how the remake just happened. You've also not done a vampire film yet, and this one has lots of great creature FX from Richard Edlund.
OH! How about Michael Dougherty's horror anthology epic, Trick r' Treat?!
EDITED TO ADD: The Monster Squad, Scream, The Evil Dead, Cloverfield, Deep Rising and The Fog (it's weird that you guys haven't done more Carpenter films than just The Thing). 
EDITED TO ADD: Splinter, Gore Verbinski's The Ring, Pet Semetary 1 & 2 (isn't it about time for Trey's stories to be in their proper context?), Slither (Fillion!), Identity and Clive Barker's Hellraiser.