Awesome, thanks for all the great suggestions everyone.

Out of all those, the ones I haven't seen are:

-Wake Wood
-Texas Chainsaw Massacre
-Torchwood: Children of Earth
-Trick or Treat
-Insidious

Might have to draw one out of a hat to see which one I go for.

Here are a few recommendations from meself:

-Rec 1 & 2 (Spanish)
-Dog Soldiers (Scottish)
-Frozen
-The Hole
-The Mist
-The Eye (Hong Kong)
-Final Destination
-Sauna (German)
-Braindead
-Versus (Japanese)
-The Fly
-Frailty
-Ils (French - stands for 'Them')
-Identity
-One Missed Call (Japanese)
-Triangle