200 NL Good floating?

[speedgun]

Villain is 20/17/4.37 over 600 hands and probably a little bit too aggressive postflop with medium strength hands. Good spot to bet river?

Poker Stars, $1/$2 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

SB: $198
BB: $120
Hero (UTG): $299.40
CO: $193.70
BTN: $287.90

Pre-Flop: 7[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $8</font>, <font color="red">CO raises to $24</font>, 3 folds, Hero calls $16

Flop: ($51) 5[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $40</font>, Hero calls $40

Turn: ($131) T[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, CO checks

River: ($131) A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $112</font>,