As a general rule, I don't like calling off the better portion of my stack when players only need one of 4 face cards to make a really good hand like a straight, flush, or full house that will beat me. In this case, a 9 has you crushed and then you're drawing to one of four Kings. Without any reads, I put this player on one of four hand ranges:

1) Connectors like T9 or 98
2) Speculative hands like A9 or 99
3) KQs or QJs drawing to the flush
4) AQ or KK or KQo or QJo or rags/busted draw and total bluff

1 and 2 have you crushed, 3 gives him lots of outs, and 4 is the best case scenario. But unfortunately, 4 is also the least likely way the hand would play out in my opinion. With any of the #4 hands, he should have all the fear that YOU would have about hand ranges 1, 2, and 3 plus he's acting out of position. The pot was pretty big @ the turn and if he did have a 9, it was a perfect opportunity to not only bet for value, but also to drive the price up so you can't afford to draw for a King and out str8 him.

I like the lay down. Continuing with the hand when he's shown this much aggression @ the turn, unless you have a really good read to the contrary, is just showing you're married to aces.