1) The Dark Knight (entertaining)
2) The Prestige and Batman Begins
Haven't seen Insomnia (will next week when I buy it on blu-ray) or Following. What's awesome is those 4 films are probably in my top 15, possibly top 10.
"You see, it's the slow knife,
the knife that takes its time,
the knife that waits years without forgetting,
then slips quietly between the bones.
That's the knife that cuts deepest."