5/10 NL, trips facing river c/r

[Tokyo!!]

Villain is Xaston. He runs at roughly 30/23, is pretty darned aggro, and already got his stack in twice so far on flops where he was pretty far behind twice with draws. Once he bet/3bet QJ on KTx board and got stacked by AK. The other time he 3bet KsJs from the button vs a solid reg, then c-bet on the AsQsQd flop and called the c/r allin getting like 1.8 to 1 or so. Basically, he loves to shove his stack in the middle. However, wtf in this hand. He seems really strong. Comments on all streets appreciated. UTG just sat down, so no read on him. CO is a megafish and I was trying to be in as many pots as possible with him.

PokerStars No-Limit Hold'em, $10 BB (6 handed) internettexasholdem.com

UTG ($1000)
MP ($1387)
CO ($3005.15)
Hero ($2565)
SB ($950)
BB ($1798)

Preflop: Hero is Button with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises to $40</font>, <font color="#666666">1 fold</font>, CO calls $40, Hero calls $40, <font color="#666666">1 fold</font>, BB calls $30.

Flop: ($165) Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">UTG bets $50</font>, CO folds, <font color="#CC3333">Hero raises to $170</font>, BB calls $170, UTG folds.

Turn: ($555) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($555) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $375</font>, <font color="#CC3333">BB raises to $1588</font>, Hero folds.

Final Pot: $2518