How far do I push AQs preflop here?

Middle rounds of PS $45k guaranteed tourney. Avg stack is about 15,000. Villain is 29/4.5/0.63 after 45 hands. He's decent, although he has made some so-so calls.

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (9 handed) converter

CO (t34882)
Button (t13725)
SB (t29365)
Hero (t18523)
UTG (t14530)
UTG+1 (t8065)
MP1 (t15955)
MP2 (t12970)
MP3 (t9008)

Preflop: Hero is BB with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls t400, MP3 calls t400, <font color="#666666">2 folds</font>, SB completes, <font color="#CC3333">Hero raises to t2000</font>, <font color="#CC3333">MP2 raises to t3625</font>, MP3 folds, SB folds, <font color="#CC3333">Hero ???