Bet turn? How much? ($1/2 deep)

[wazz]

Villain is 48/18/2.3. He's a semibluffer, but looks out of the water in big pots. I've seen him misplay draws heavily a few times, but is not a huge donator.

Whether or not to bet the turn isn't quite trivial, but I'm pretty sure I bet it 100%. Anyone have any convincing arguments as to whether or not to check?

The issue, though, is stack sizes. I think a lot of his range is KK + flush draw, so I need to leave myself room to make a big bluff should I miss.

Poker Room skin
Pot Limit Omaha Ring game
Blinds: $2/$2
7 players
Converter

Stack sizes:
UTG: $1.117.80
UTG+1: $415.80
MP1: $104.70
hero: $465.80
Button: $197.65
SB: $196
BB: $350.15

Pre-flop: (7 players) hero is CO with 8[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
UTG folds, <font color="#cc0000">UTG+1 raises to $8</font>, MP1 folds, hero calls, 2 folds, BB calls.

Flop: 6[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] ($26, 3 players)
BB checks, <font color="#cc0000">UTG+1 bets $15</font>, <font color="#cc0000">hero raises to $71</font>, BB folds, UTG+1 calls.

Turn: J[img]/images/graemlins/heart.gif[/img] ($168, 2 players)
UTG+1 checks, <font color="#cc0000">hero bets</font>?