My struggle against my inner calling station, part 2

[Neku]

I've realised that I'm calling down too many weak hands - I'm rarely over 50 % W@SD. This is a typically tough spot. Inside straight draw with one overcard on the turn. Pot offers 5:1.

Poker Stars
Limit Holdem Ring game
Limit: $0.25/$0.5
10 players
Converter

Pre-flop: (10 players) Hero is SB with A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img]
2 folds, UTG+2 calls, 3 folds, CO (poster) checks, Button folds, <font color="#cc0000">Hero raises</font>, BB folds, UTG+2 calls, CO calls.

Flop: 9[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] (7SB, 3 players)
<font color="#cc0000">Hero bets</font>, UTG+2 calls, CO calls.

Turn: T[img]/images/graemlins/club.gif[/img] (5BB, 3 players)
Hero checks, <font color="#cc0000">UTG+2 bets</font>, CO calls, Hero...?