25/50 need a line vs. total wacko

[king_of_drafts]

Villain is a huge crazy fish who hates to fold. Played a big pot vs him earlier:

Poker Stars - No Limit Hold'em Cash Game - $25/$50 Blinds - 9 Players - (LegoPoker HH Converter)

SB: $5,252.00
BB: $2,462.00
UTG: $867.00
UTG+1: $3,937.00
MP1: $3,417.50
MP2: $5,814.50
MP3: $7,166.00
Hero (CO): $4,650.00
BTN: $5,247.00

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (9 Players)
<font color="red">UTG raises to $150.00</font>, 4 folds, Hero calls $150.00, BTN folds, SB calls $125.00, BB folds

Flop: ($500) 8[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (3 Players)
SB checks, <font color="red">UTG bets all-in for $717.00</font>, Hero calls $717.00, SB calls $717.00

Turn: ($2651) 6[img]/images/graemlins/club.gif[/img] (3 Players - 1 All-In)
<font color="red">SB bets all-in for $4,385.00</font>, Hero calls all-in for $3,783.00
Uncalled bet of $602.00 returned to SB

River: ($10217) 5[img]/images/graemlins/club.gif[/img] (3 Players - 3 All-In)

Pot Size: $10,217.00 ($3 Rake)

SB had J[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (three of a kind, Sixes) and WON (+$5,564.00)
UTG had Q[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] and LOST (-$867.00)
Hero had K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] and LOST (-$4,650.00)

Sooooo...what line do I take on this turn? I'm not sure if he knows how to c/r.

Poker Stars - No Limit Hold'em Cash Game - $25/$50 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $4,950.00
BB: $5,098.00
UTG: $8,752.00
CO: $10,846.00
Hero (BTN): $12,217.00

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] (5 Players)
<font color="red">UTG raises to $150.00</font>, CO calls $150.00, Hero calls $150.00, SB folds, BB calls $100.00

Flop: ($625) 2[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] (4 Players)
BB checks, UTG checks, CO checks, <font color="red">Hero bets $476.00</font>, BB calls $476.00, 2 folds

Turn: ($1577) 7[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero....