It would depend on my table image.

If I had been playing laggish then I would bet out 300 and hope one of them has something they are willing to play for. I think you get the most action that way as you can build a pot and either milk a 2nd best hand for alot of chips or induce a big bluff on later streets.

Then again if you have been playing very tight then there is a big chance they will fold to any opening bet from the small blind with that board. In that case I would check/call and see how they react hoping to pop them on the turn or river.