AA blind vs. blind

[nazahl]

villain is relatively unknown - 23/17/2.6 but only over 40-50 hands. seemed pretty normal at the time, this was also the first time he played back at me after calling from the bb against my open.

Full Tilt Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker Hand History Converter)

Hero (SB): $266.75
BB: $353.05
UTG: $326.80
CO: $288.00
BTN: $138.95

Preflop: Hero is dealt A[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img] (5 Players)
3 folds, <font color="red">Hero raises to $6.00</font>, BB calls $4.00

Flop: ($12) K[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $12.00</font>, <font color="red">BB raises to $40.00</font>, Hero ???

wtf is best here?