early AK hand...prudent or too passive?

[ssnyc]

2nd hand of Stars $12 180...I usually cbet but I think people in these call c bets very light and didnt see a reason to commit too many chips at this stage? Correct thinking? I also toyed with pushing 1500 into a $60 pot to see if I would get a suspicious call...any merit in that either?

Poker Stars
No Limit Holdem Tournament
Blinds: t10/t20
9 players

UTG: t1500
UTG+1: t1500
MP1: t1260
MP2: t1500
MP3: t1500
Hero: t1500
Button: t1260
SB: t1980
BB: t1500

Pre-flop: (9 players) Hero is CO with KS AD
UTG folds
UTG+1 calls t20
2 folds
MP3 calls t20
Hero raises to t100
3 folds
UTG+1 calls t80
MP3 calls t80

Flop: (t330) 6S QH 5S (3 players)
UTG+1 checks, MP3 checks, Hero checks.

Turnt330) JH (3 players)
UTG+1 checks
MP3 bets t340
Hero folds
UTG+1 folds.
Uncalled bets: t340 returned to MP3

Final pot: t330