AK early in APPT $215 sng

[wandigo]

4th hand of the APPT $215 Step 4 SNG. Sometimes I'll smooth call here, sometimes I'll raise. Went with the former this time.
PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

MP2 (t1530)
MP3 (t1550)
CO (t1470)
Button (t1470)
SB (t1480)
Hero (t1500)
UTG (t1500)
UTG+1 (t1500)
MP1 (t1500)

Preflop: Hero is BB with , .
7 folds, SB raises to t40, Hero calls t20.

Flop: (t80) , , (2 players)
SB bets t60, Hero raises to t200, SB raises to t400, Hero ????

[JSmith2007]

Any reads on SB that he's done out of the ordinary so far or previous play with villain?

I think against an unknown, it's fine to raise this and see what he does. If he shoves, hate to do it, but call and hopefully see some crap like Q10 or two hearts, drawing heavily over a set. AQ seems like a very big possibilty, as does AJ, with the minimal raise from the SB.