Top pair and 4-flush

[New001]

Villain here is a 40/6.67/1.75 after a fairly meaningless 15 hands. I haven't seen him do anything weird, but I haven't been paying much attention either (first time playing after a week-long break).

Party Poker 3/6 Hold'em (9 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (4 SB) 6[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP2 raises</font>, CO folds, SB folds, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP2 caps</font>, Hero calls.

Turn: (6 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets</font>, Hero calls.

River: (8 BB) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets</font>, Hero calls.

Final Pot: 10 BB

I think every postflop street is debatable. I especially wanted to lead the river so it wouldn't get checked through by the A[img]/images/graemlins/club.gif[/img], but I didn't because I didn't really want to call a raise. Bet/call, bet/fold, check/call, or check/raise the river?

For what it's worth, I think betting and calling a raise is best. Thoughts?