Good topic - I find
Se7en 
doesn't bear rewatching - it's alright, well acted and well shot - but the plot is poor.
It takes a really good thriller to stand a rewatch because when you know what is going to happen obviously a lot of the 'thrill' goes out the window.
Klute is a great thriller, as is
Blue Velvet (in its own special head-fucked way). I'm extemely fond of
North by North West - but I don't think it is 'great'. For a supernatural thriller I think
Fallen is pretty damn great.
I haven't had enough coffee yet so I'm sure I'll think of more later...
Oooo -
French Connection!