NL50,6m - combo draw. Good line ?

[shtirlis]

Seat 2: metterling68 ($64.20 in chips) unknown villain
Seat 6: regab1 ($76.15 in chips)
Seat 8: sigeanot ($47.20 in chips)
Seat 9: bloody693 ($50.25 in chips)
Seat 10: frolches ($51.25 in chips) 6 [img]/images/graemlins/club.gif[/img],4 [img]/images/graemlins/club.gif[/img]



ANTES/BLINDS
metterling68 posts blind ($0.25), regab1 posts blind ($0.50).

PRE-FLOP
sigeanot folds, bloody693 folds, frolches bets $1.50, metterling68 bets $3, regab1 calls $2.75, frolches calls $1.75.

FLOP [board cards: 5 [img]/images/graemlins/club.gif[/img],K [img]/images/graemlins/club.gif[/img],4 [img]/images/graemlins/spade.gif[/img] ]
metterling68 bets $7, regab1 folds, frolches calls $7.

TURN [board cards: 5 [img]/images/graemlins/club.gif[/img],K [img]/images/graemlins/club.gif[/img],4 [img]/images/graemlins/spade.gif[/img] ,J [img]/images/graemlins/spade.gif[/img] ]
metterling68 checks, frolches checks.

RIVER [board cards: 5 [img]/images/graemlins/club.gif[/img],K [img]/images/graemlins/club.gif[/img],4 [img]/images/graemlins/spade.gif[/img] ,J [img]/images/graemlins/spade.gif[/img] ,9 [img]/images/graemlins/heart.gif[/img] ]
metterling68 bets $12, frolches folds.

SHOWDOWN
metterling68 wins $34.60.

How do you see best line on this hand ?