Raise the river or go for an overcall?

[PantherZ]

I'm faced with a river decision on whether to raise or just call and induce an overcall from the CO. If I raise, I might not collect any more money. Your opinions?

Party Poker 2/4 Hold'em (8 handed)

Preflop: PantherZ is MP2 with K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="CC3333">UTG+1 raises</font>, MP1 folds, PantherZ calls, CO calls, Button calls, SB folds, BB calls, UTG calls.

Flop: (12.50 SB) 4[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="blue">(6 players)</font>
BB checks, UTG checks, <font color="CC3333">UTG+1 bets</font>, PantherZ calls, CO calls, Button calls, BB calls, UTG calls.

Turn: (9.25 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="blue">(6 players)</font>
BB checks, UTG checks, UTG+1 checks, PantherZ checks, CO checks, Button checks.

River: (9.25 BB) 7[img]/images/graemlins/diamond.gif[/img] <font color="blue">(6 players)</font>
<font color="CC3333">BB bets</font>, UTG folds, UTG+1 folds, PantherZ ???