3/6 nut flush, paired river, $650 bet

[SmackinYaUp]

Villain in this hand was talkin trash all night, I was talking back to him and had stacked him about 30 minutes ago. I told him I would stack him again a few times and he talked trash back and gave me a hard time when I raised preflop. Sometimes he would float and fold me out, other times I would win without showdown. He's been difficult but exploitable as he'd been running 45/20 for some time now. His stack has been going through some swings but he's getting paid when he hits. I haven't seen him go this crazy on any river yet but he does over value hands and on top of that he was gunning for me. I think I won a couple of pots against him not too long before this hand and had him steaming a little. At first I put him on flush draw or some other random float then on the river I put him on a king and called. Thoughts?

Party Poker
No Limit Holdem Ring game
Blinds: $3/$6
6 players
Converter

Stack sizes:
Hero: $1683.67
UTG+1: $589.70
CO: $845.80
Button: $268.32
SB: $445
BB: $607.80

Pre-flop: (6 players) Hero is UTG with A[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises to $24</font>, UTG+1 folds, CO calls, 3 folds.

Flop: 9[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/heart.gif[/img] ($57, 2 players)
<font color="#cc0000">Hero bets $47</font>, CO calls.

Turn: 8[img]/images/graemlins/diamond.gif[/img] ($151, 2 players)
<font color="#cc0000">Hero bets $125</font>, CO calls.

River: K[img]/images/graemlins/diamond.gif[/img] ($401, 2 players)
<font color="#cc0000">Hero bets $200</font>, <font color="#cc0000">CO raises all-in $649.8</font>, Hero calls.

Results:
Final pot: $1700.6