Blind steal gone good…slow play or take it down?

[EnderIII]

Party Poker No-Limit Hold'em Tourney, Big Blind is t6000 (9 handed) FTR converter on zerodivide.cx

MP3 (t11780)
Hero (t95057)
Button (t68552)
SB (t148424)
BB (t148350)
UTG (t24540)
UTG+1 (t44478)
MP1 (t86124)
MP2 (t77596)

Preflop: Hero is CO with 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Hero raises to t12000</font>, <font color="#666666">2 folds</font>, BB calls t6000.

Flop: (t27000) 8[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">

hero?

My thoughts -- torn between wanting to secure the pot now since the board is so draw heavy and wanting to extract more value if he might take a stab at the pot on the turn if a J-A comes. If i bet here, how much should I bet? Half the potish to look like a standard continuation bet, or push all-in to make it look like a semi-bluff? If I check, how should i play the turn if a card that completes a draw comes out?