100NL - Flop set 3-way, turn play

[toohigh]

SB is 25/14/5 over large sample, UTG is 49/15/1.5 over 180 hands. They both probably view me as slightly LAGish. SB has cold called a couple of my button raises already, I haven't noticed UTG open limp in EP yet.

My main question is on the turn action, but comments on all streets appreciated.

Full Tilt Poker
No Limit Hold'em Cash Game
$0.50/$1 Blinds
6 Players
Lego Poker Hand Converter

<font color="black">Stack Sizes</font>
<font color="black">SB: $66.40</font>
BB: $100
<font color="black">UTG: $198.30</font>
UTG+1: $71.55
CO: $116.25
<font color="black">Hero (Button): $123.80</font>

<font color="black">Preflop:</font> 3 3[img]/images/graemlins/heart.gif[/img] ($1.50, 6 Players)
UTG calls $1, 2 folds, <font color="red">Hero raises to $4.50</font>, SB calls $4, BB folds, UTG calls $3.50

<font color="black">Flop:</font> A 3 4 ($14.50, 3 Players)
SB checks, UTG checks, <font color="red">Hero bets $12</font>, SB calls $12, UTG calls $12

<font color="black">Turn:</font> A 3 4 7[img]/images/graemlins/spade.gif[/img] ($50.50, 3 Players)
SB checks, UTG checks, Hero?