I really liked The Blair Witch Project, and I didn't go into the film thinking it was real. Of the other films you listed that I've seen, I enjoyed:
Cloverfield
Quarantine (saw this before Rec, but they rate about the same)
Paranormal Activity
Troll Hunter
Monsters - I was torn with this one. I loved the monsters, and was disappointed I didn't see more of them.
The Poughkeepsie Tapes - just mediocre.
I also liked The Last Broadcast; a film that was made not too long before Blair Witch about a film crew that went out in the woods to make a short film about the Jersey Devil.
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