250BB deep, flopped straight vs. LAG

[feelixthegreek]

1/2 NL live. Me and villain have $500 stacks

I am regarded by most of the table as tight/rockish. On the button after several limpers I make it $15 with 6h5h. All fold to player just to my right, the only player who has me covered. I have never played with him before, but earlier I watched him make a pot sized $100 bet on the turn with a gutshot, even though one of the remaining players had only $20 and was obviously committed. All in all, I figure him to be LAGgy.

(Pot $35)
Flop is 8c7c4d. Villain leads out for $15. I smooth call.

(Pot $65)
Turn is an irritant, the 4c. Villain leads out for $50. I raise to $150. Villain calls.

(Pot $365)
River is the Kd. Villain shoves. Hero...?