Straight flush on turn - now what?

[Beck]

Bodog 10+1 (1000 chips each)
First hand of tourney, so no reads.
Blinds 5/10
Hero is dealt 5 [img]/images/graemlins/heart.gif[/img]6 [img]/images/graemlins/heart.gif[/img] in MP3

UTG limps, hero limps, and SB raises to 20, everybody call.

Flop (Pot: 80)
4 [img]/images/graemlins/heart.gif[/img] 7 [img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img]

SB checks, BB bets 100, UTG calls, Hero raise to 200, SB folds, BB calls, UTG calls.

Turn (Pot: 680)
3 [img]/images/graemlins/heart.gif[/img]
BB checks, UTG check, Hero bets how much?

[The Stick]

I'd go 150, maybe 175 if I thought they both might call... just enough to give Ah and Kh proper pot odds to chase what they think are "the nuts". Can't go lower than 100 here after the bet was 100 the last round and it was raised 100 more. If you did drop to 50-75, then both calling is the same as one calling 100-150, and one of the probably has at least one heart, if not two, since so many play any two suited on level 1.

Don't want to bet too little because you won't get anything from Ah or Kh on the river if the heart misses, unless he's got Ah 7o, so you've got to make the profit now while they still think they're drawing live.

And they're already down to 780 to see this turn card... I don't think you'll get both of them calling for 200 more... dropping from 1000 to 580 on hand 1 in a 3-way pot is a psycological barrier they might not cross. So make it 150 and hope they both call, for 300 more in your pot, and hope that they hit their nut flushes, or pair their kickers, fill up their boats, or whatever they're praying for lands on the river. Or, pray that you're checkraised right now and get a third guy sandwiched in between, you could triple up right away.