Help me play opened-ended straight draws in position on the flop!

[Chaser8]

Villain's stats are 20/11/1.41. We have no history between us.

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

UTG: $396
Hero (MP): $405.20
CO: $200.66
BTN: $595.50
SB: $390.20
BB: $408.10

CO posts $4
Pre-Flop: J[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] dealt to Hero (MP)
<font color="red">UTG raises to $16</font>, Hero calls $16, 3 folds, BB calls $12

Flop: ($54) 9[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, <font color="red">UTG bets $40</font>, Hero calls or raises?

I'm torn between calling and raising. If I call and miss on the turn, he could fire another full barrel and force me to fold. If I raise, he could reraise all in, giving me crappy odds to call.

What to do?