$600NL. River trips facing pot sized bet.

[cbboy]

Villain is 20/9/2 over a decent datamined sample. We don't have any history at all. What is the best move on the river here? I'm really not sure how I feel about this one. I think its possible for him to show up with something like AK/AQ here too, but I'm not really sure since this is my first time playing with him. The only set that he can have is 66 (AA is unlikely and he probably doesn't call flop with 33). So, what do you guys think is the best move here? Thanks!

Party Poker
No Limit Hold'em Cash Game
$3/$6 Blinds
6 Players - (LegoPoker Hand History Converter)

<u>SB: $645.00</u>
BB: $347.64
<u>Hero (UTG): $629.00</u>
MP: $753.15
CO: $111.00
BTN: $618.00

Preflop: Hero is dealt 8[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">Hero raises to $21.00</font>, 3 folds, SB calls $18.00, BB folds

Flop: ($48) 6[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $33.00</font>, SB calls $33.00

Turn: ($114) 3[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, Hero checks

River: ($114) 7[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets $111.00</font>, Hero....!?!?!?