$114: Overcall with A9?

[Chipchucker5]

Both players are relative unknowns. Sb seems bad...maybe weak-tight. Get it in?

PokerStars Tournament, Big Blind is t400 with t25 antes (5 handed) Converter on pregopoker.com

UTG (t2180)
CO (t2405)
Button (t5585)
SB (t1020)
Hero (t2310)

Preflop: Hero is in BB with A[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">CO folds</font>, <font color="red">Button raises to t800</font>, <font color="red">SB raises to t995 (All-in)</font>, Hero?