AK out of position

[Peak01]

I hate this spot out of position. Should I always be betting again on this turn or is check calling to keep the pot small okay?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker HH Converter)

Hero (SB): $61.05
BB: $101.50
UTG: $53.55
CO: $131.40
BTN: $104.55

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] (5 Players)
2 folds, BTN calls $1.00, <font color="red">Hero raises to $4.00</font>, BB folds, BTN calls $3.00

Flop: ($9) 8[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $6.00</font>, BTN calls $6.00

Turn: ($21) 4[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero?