[Sculpt]

There's plenty of good choices for the couple you described. I think you want to have a horror film that not only isn't gory, but one that doesn't include material you don't want to see in mixed company -- like graphic sexual or very obscene material. You just want to have a good time and some conversation. Could be psychological, but I wouldn't limit yourself to that.

I'd recommend one of these. Whatever fits best, maybe grab a few to have one nobody has seen, or not seen for years:


Magic 1978 - (excellent psychological thriller that's scary too. Ventriloquist (Anthony Hopkins) struggles with putting his dummy down for a few seconds. If you haven't seen it, I don't want to give any spoilers)
Insomia - (excellent psychological thriller film directed by Christopher Nolan and starring Al Pacino, Robin Williams, and Hilary Swank. Williams as serial killer)
Frankenstein 1931 - (bone chilling realism and topic, striking visuals)
Invasion of the Body Snatchers 1978 - (creepy and thought provoking)
The Amityville Horror 1979 - (scary, interesting, personal experiences conversation provoking)
Jacob's Ladder - (dark and thought provoking)
Donna Darko - (dark, mildly scary, strange, thought provoking)
Red Dragon 2002 - (Ed Norton and Hopkins battle witts, psychological thriller)
Sixth Sense -
Scanners 1981 - (people with unusual telepathic and telekinetic powers)
Se7en -
The Night Stalker 1972 - (excellent movie, reporter discovers real vampire in 1972 Vas Veges)
The Butterfly Effect 2004 - (well made thrill ride, thought provoking, more sci-fi than horror)
The Thing 1982 -