$40/$80 free showdown raise spot?

[drbk2]

I hate the free showdown raise as much as anyone else, but how is it against a pretty good player (or someone I perceive to be a pretty good player) who is used to being the most aggressive guy at the table? Here is the spot. The villain is James Van Alstyne I think, the guy who plays a lot of tournies and I think made a final table at a WPT event last year. $40/$80 at the Borgata. He hasn't really done much at the table so far and has only played a couple of orbits. I've been playing pretty snug but have been talking at the table quite a bit since I knew a lot of the players and may appear to be looser than normal.

I raise black 9's in middle early position. Small blind moron calls, James Van Alstyne is the big blind and calls. I yell "6!" for no reason.

Flop: J 6 2 two diamonds. Checked to me and I bet. Small blind folds and the big blind raises. I call.

Turn: Th. He bets. I do what?