RR pot vs nit, what to do on this turn?

[DanJ.]

Villain is 14/10/6 - he 3bets me everynow and then. usually he makes it $12 when i open for $4, so this glorified minraise is weird.

Party Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $103.10
CO: $105.40
Hero: $194.05
SB: $19.75
BB: $92

Pre-flop: (5 players) Hero is Button with K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img]
UTG calls, CO folds, <font color="#cc0000">Hero raises to $5</font>, SB folds, <font color="#cc0000">BB raises to $11</font>, UTG folds, Hero calls.

Flop: 9[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] ($23.5, 2 players)
<font color="#cc0000">BB bets $17</font>, Hero calls.

Turn: 8[img]/images/graemlins/diamond.gif[/img] ($57.5, 2 players)
BB checks, <font color="#cc0000">Hero