Give him credit for an overpair?

[DarrenX]

FWIW, I play it pretty much the exact same way, and pretty confidently fold knowing he had me beat. I think a reraise preflop is a pretty poor idea- your stack is too big to push preflop, and while you could raise to 800 or so to see what's up, I imagine a good player would be pushing AK in that spot along with his overpairs. Play for the set/overpair, and fold to resistance on the latter.