Big Semi-Bluff against the other chip leader

[kiffl]

Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (6 handed) converter

UTG (t780)
MP (t480)
Hero (t1890)
Button (t1450)
SB (t1875)
BB (t1525)

Preflop: Hero is CO with 9[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t200</font>, <font color="#666666">1 fold</font>, SB calls t175, <font color="#666666">1 fold</font>.

Flop: (t450) T[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t400</font>, SB calls t400.

Turn: (t1250) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero raises all-in, SB folds.

Final Pot: t1250



What does everyone think of this play? I know playing draws in sngs is a bad idea, but I still think this is a very good move. It tells the other players not to mess with me and if I call and win I have an aggressive image.