Ace Jack on the button

[bruce]

$1000 buyin NLHE at the Commerce. Second level with blinds
of 25/50. CO openraises for T150 He seems to be overly
aggressive. He has about T3000. I have around T2000. We
all start with T1500. I reraise to T475 with AJo on the button. He calls.

Flop comes Ks Kh 9c.

He checks and I bet T500. He calls.

Turn Ks Kh 9c Jd.

He checks, I check.

River a blank. He bets T600. What's my play? The pot if I call is T2625. If I lose I have around T500 in chips left. If I call I'm getting 4:1. I think my play on all
streets is certainly very debatable.

Comments appreciated.