$5 Party Multi - flopped K high flush

[NNH]

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (10 handed)

MP3 (t1548)
CO (t1265)
Button (t2160)
Hero (t2365)
BB (t493)
UTG (t645)
UTG+1 (t3285)
UTG+2 (t1484)
MP1 (t1500)
MP2 (t570)

Preflop: Hero is SB with 3[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img].
UTG calls t100, UTG+1 calls t100, UTG+2 calls t100, MP1 folds, MP2 folds, MP3 calls t100, CO calls t100, Button folds, Hero completes, BB checks.

Flop: (t700) 7[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="blue">(7 players)</font>
Hero checks, BB checks, UTG checks, UTG+1 checks, <font color="CC3333">UTG+2 bets t300</font>, MP3 folds, CO calls t300, <font color="CC3333">Hero raises to t900</font>, BB folds, UTG folds, UTG+1 folds, UTG+2 folds, <font color="CC3333">CO raises to t1165 (All-In)</font>, Hero calls t265.

Turn: (t3330) J[img]/images/graemlins/heart.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

River: (t3330) 9[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

Final Pot: t3330



Halfway through the field. As you can see it's a fairly loose table.

I complete the blind. No prob there.
I check initially expecting a bet and planning to raise. My thinking here is that someone has that A [img]/images/graemlins/club.gif[/img]. I raise hoping to knock that hand out (was my raise even big enough here?)

How would some of you handle this hand? Thanks.