($22) KQs TPGK facing likely weak flush on river

[ilya]

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) FTR converter on zerodivide.cx

UTG+1 (t345)
Hero (t795)
MP2 (t770)
MP3 (t1485)
CO (t1710)
Button (t690)
SB (t575)
BB :#A500AF(Villain)/ (t770)
UTG (t860)

Preflop: Hero is MP1 with K[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, Hero calls t30, <font color="#666666">5 folds</font>, BB :#A500AF(Villain)/ checks.

Flop: (t75) K[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain bets t40</font>, Hero calls t40.

Turn: (t155) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets t100</font>, Villain calls t100.

River: (t355) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, Hero ...?

Comments on all streets welcome (except for "fold preflop"), but mostly I wonder whether you think betting the river might be a good idea.