Middle pair on dangerous board. Poker Stars $35 6- Handed SNG

[emptypockets]

Villain has played solid poker so far. What action shall I take?


PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (4 handed) FTR converter on zerodivide.cx

SB (t1710)
Hero (t1820)
UTG (t2705)
Button (t2765)

Preflop: Hero is BB with 3[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/club.gif[/img].
2 folds[/i]</font>, SB completes, Hero checks.

Flop: (t200) A[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] (2 players)</font>
SB bets t100</font>, Hero calls t100.

Turn: (t400) Q[img]/images/graemlins/spade.gif[/img] (2 players)</font>
SB checks, Hero bets t300</font>, SB raises to t600</font>,

HERO?