Does a Better Player Play This Differently?

[Jeffage]

5 handed 10-20. I have K [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/heart.gif[/img] second to act. UTG raises...he seems decent, somewhat aggro but this is the first I've played with him. I reraise. Folded to a loose player in the SB who coldcalls. UTG now caps and we both call. Three to the flop of 9 [img]/images/graemlins/club.gif[/img]6 [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/heart.gif[/img]. SB checks, UTG bets, I raise, SB calls (seemingly w/ instacall checked), UTG 3-bets, I cap and both call. The turn is the K [img]/images/graemlins/club.gif[/img]. SB checks, UTG bets, I just call (seems like raise would be spewing at this point) and SB calls. The river is the 5 [img]/images/graemlins/spade.gif[/img]. SB checks, UTG bets. Muck or pay off cause the pot is big?

Thanks,
Jeff