($24) AQo missed vs. a limp-caller. Cbet or not cbet?

[Pocketbear]

The villain is 21/9.

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t40/t80
9 players
Converter

Stack sizes:
UTG: t3030
UTG+1: t1395
MP1: t210
MP2: t375
MP3: t2325
CO: t1720
Hero: t1395
SB: t1460
BB: t1590

Pre-flop: (9 players) Hero is Button with A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img]
4 folds, MP3 calls t80 <font color="aaaaaa">(pot was t120)</font>, CO folds, <font color="#cc0000">Hero raises to t240</font>, 2 folds, MP3 calls t160 <font color="aaaaaa">(pot was t440)</font>.

Flop: 9[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] (t600, 2 players)
MP3 checks, Hero?