What line would be the bluffiest on this particular board? Would you agree with how I played this turn, given the flop play?

Opponent was a standard lag, but didn't bet too much on later streets during the match.

Full Tilt No-Limit Hold'em Tournament, 40/80 Blinds (2 handed) - Full-Tilt Replayer from Poker Hands Replayer

Jizzy Sawya (Button) (t1340)
SB (t1660)

Jizzy Sawya's M: 11.17

Preflop: Jizzy Sawya is Button with ,
Jizzy Sawya bets t240, SB calls t160

Flop: (t480) , , (2 players)
SB bets t320, Jizzy Sawya calls t320

Turn: (t1120) (2 players)
SB checks, Jizzy Sawya bets t780 (All-In),