KQs - how to play (scary) river

[pokernicus]

Comments on all streets are welcome, though I'm specifically interested in thoughts on how to play this on the river.

My read is that the villain plays semi-loose, and tends to be aggressive when he has a made hand (but otherwise seems pretty passive). I feel confident that I am ahead through the turn, but the T on the river is not a pleasant card as the board is now highly coordinated.

Am I better off checking or betting?

Party Poker 1/2 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG+1 with K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, Hero calls, UTG+2 calls, <font color="#666666">5 folds</font>, SB completes, BB checks.

Flop: (4 SB) Q[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, UTG+2 calls, SB calls, BB folds.

Turn: (3.50 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG+2 calls, SB folds.

River: (5.50 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero??