PP 11: AQ facing 2 all in

[Anjin]

PartyPoker $11 Regular Tournament, Big Blind is t400 (5 handed) Converter on pregopoker.com

UTG (t3558)
CO (t5997)
Button (t1161)
SB (t4847)
Hero (t4437)

Preflop: Hero is in BB with A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">CO folds</font>, <font color="red">Button raises to t1161 (All-in)</font>, <font color="red">SB raises to t4847 (All-in)</font>, <font color="gray">

Hero /?

Button has raised all in several times recently trying to build his stack, and has been called only rarely. SB is a decent player. I estimate his range at 66+ and AT+.

Suggestions welcome. Please explain your reasoning.