Fido (2006) - Utterly brilliant. Watch it if you haven't.
Grave Encounters (2011) - Both V and I liked it and thought it was a good addition to the "found footage" tome - Roshiq didn't really like it, though.
Insidious (2010) - Honestly, not my favorite (1/3 brilliant movie, 2/3 debacle)... But I know a lot of people here liked it...