Turn play, when the board is four to straight, tricky opponent

[Zealot]

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

Stack sizes:
UTG: $70.57
Hero: $171.15
CO: $199.30
Button: $101.50
SB: $159.75
BB: $111.35

Pre-flop: (6 players) Hero is UTG+1 with T[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img]
UTG folds, Hero raises to $4</font>, 2 folds, SB calls, BB folds.

Flop: 2[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img] ($9, 2 players)
SB checks, Hero bets $6</font>, SB calls.

Turn: 4[img]/images/graemlins/club.gif[/img] ($21, 2 players)
SB checks, Hero ??

Villain is not good and even stacked off once with top pair middle kicker. He likes to check raise on dangerous flops like paired ones etc so he playes kind of tricky but obviously not in a good way for himself, but he can be annoying when he puts u to the test.

I am pretty sure that my hand is the best hand right now, because he also peels the flop pretty light.

What should be my turn plan?