15/30 KK value bet the river?

[Garland]

Great loose game. The opponents are average and aggressive.

How's the line, and do you value bet the river given the all-in player?

Garland

Paradise Poker 15/30 Hold'em (10 handed) converter

Preflop: Garland is MP2 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, UTG+2 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Garland raises</font>, <font color="#666666">5 folds</font>, UTG+1 calls, UTG+2 calls.

Flop: (7.66 SB) 7[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">UTG+2 bets</font>, Garland calls, UTG+1 calls.

Turn: (5.33 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">UTG+2 bets</font>, <font color="#CC3333">Garland raises</font>, UTG+1 calls all-in, UTG+2 calls.

River: (11.33 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font> UTG+2 checks, Garland ???