FTP NL100 - Value bet this river?

[tubasteve]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $162.90
BB: $240.25
UTG: $67.25
Hero (CO): $103.50
BTN: $127.50

Preflop: Hero is dealt J[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] (5 Players)
UTG folds, <font color="red">Hero raises to $2.00</font>, 2 folds, BB calls $1.00

Flop: ($4.50) T[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets $4.50</font>, Hero calls $4.50

Turn: ($13.50) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets $13.50</font>, Hero calls $13.50

River: ($40.50) 7[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets...</font>

Do you guys value bet this river, and if so for how much? Villain is a 20/10/1.29. F/T/R aggression factors are 4.4/4/3 respectively. He seems like a bad TAG, but he has a lot of money on the couple tables I have with him.