Stop-and-Go with AQ

[kiffl]

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (5 handed) converter

SB (t1896)
Hero (t2015)
UTG (t1900)
MP (t2839)
Button (t4850)

Preflop: Hero is BB with A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, SB completes, <font color="#CC3333">Hero raises to t600</font>, SB calls t400.

Flop: (t1200) 3[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t1415 (All-In)</font>,

Was this a good place to use a stop and go, or should I have just gone all-in preflop? No reads on players, I'm 4 tabling.