Deliver Us From Evil
I just finished watching this one (crazy story related in trying to do that too), and it was actually pretty good. Crazy visuals for and pretty intense for seems like a run of the mill possession/exorcism story. And I saw a name that was familiar during the credits - Director: Scott Derrickson
where do I know that name? That's the guy who did Sinister and is directing the upcoming Doctor Strange movie for Marvel Studios (I looked it up). Now i don't remember being all that into Sinister story wise, but I think it was visually pretty creepy (I'll have to pop it in and refresh myself), but Deliver us had some pretty sick imagery going on that might make some weaker stomachs a little queasy. The action and possession/exorcism scenes were also pretty intense. So this adds a small amount of anticipation to Dr. Strange. Looking forward to a trailer for that one, sometime before end of next year.
anyway, this one I would recommend for supernatural/possession "inspired by true events" horror fans.