Flopped Straight... hard to let go

[CaptainCrunch]

this guy turned out to be a 35%vpip calling station, but this happened only a few orbits after he sat down.

Party Poker 1/2 Hold'em (6 max, 5 handed) converter

Preflop: Hero is BB with 9[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img].
UTG calls, MP calls, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (4 SB) 7[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG folds, MP calls, SB calls.

Turn: (3.50 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP calls, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero ?</font>

By the clench deep in my gut, I knew this 9 was bad for me. So, c/r on the turn. let the straight go? Or call down to the end?