AQ tough turn decision PS 25 6 max

[ThaHero]

Not many reads on villain. He calls a lot of preflop raises and plays somewhat aggressive, but most of the pots he's raised have been $3 and not 9. I should really pay more attention when playing instead of surfing 2+2. My PAHUD isn't working with Stars either right now so I don't have any stats.

My table image at this point is probably aggressive. What do I do on this turn? There's no flush or straight. What's his likely holding, AJ or 88? Or do you think he is overplaying a spade draw(he hasn't done that before to my recollection).

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) converter

SB ($38.35)
BB ($19.45)
UTG ($21.90)
MP ($7.50)
Hero ($51.85)

Preflop: Hero is Button with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $1</font>, SB calls $0.90, BB calls $0.75.

Flop: ($3) A[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $3</font>, SB calls $3, BB folds.

Turn: ($9) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $9</font>, <font color="#CC3333">SB raises to $18</font>, Hero ???