[Deckard]

Well these aren't slasher films as such, but I'm assuming some squeamish sequences are ok? If so...

Eyes Without A Face (1960)
Beautiful and unsettling.

Audition (1999)
How fucked up was this... I love Japanese horrors. The RIng, Ju On, One Missed Call (and their sequels) all wonderfully disturbing.

The Haunting (1963)
Just plain spooky.

Salem's Lot (1979)
This aired here in the UK as a mini-series I think. I remember a sequence involving these floating demons outside a kid's bedroom window that'll stay with me for as long as I live.

And I have a soft spot for hammy 60s/70s Hammer/Poe stuff with Vincent Price, Peter Cushing and Christopher Lee.

Sorry they're all oldies. I'm a bit stuck in the past these days.

@jOHN
28 Days Later was good, but avoid its sequel. And the 1978 Body Snatchers remains the best IMO.