I'd check raise.
After a preflop and flop bet, you can be pretty sure that someone will bet again, and you might well find that one of the other call, which offers up some dead money for when you make your chuny reraise.
I'm not too sure why you've played it so passively though. I think you should at least reraise prflop to define your hand better. That way you'll have a better idea of where you stand when you reach the same point rather than being forced to guess.
He should reraise himself? Cool play, which button do you press to do that?
My bad, thought he was spazmo. Another misread...
I'd stick in a chunky bet. You can't check here. If they have the straight then tough cheddar.