[rikz]

1) Lead out with PSB.

2-pair calls or raises. Overpair calls or raises. Straight flush draw calls or raises. Flush draw with a pair calls or raises. A pure flush draw might call, but shouldn't. A lower set raises. TPTK might call or raise if he thinks you're semi-bluffing. The only guys folding are those that wouldn't bet if you check anyway.

So, I say lead out for a pot-sized bet and hope somebody got a good piece of it. I think checking is bad because there is a decent chance everybody checks behind and you give away a free card that either (1) kills your action on later streets (bad), or (2) gives a flush to one of your villains forcing you to hope for a full house on the river (worse).