[Shillx]

I think that it is close between calling, raising and maybe even folding. THe upside to calling is that you encourage the guy behind you to call. The other upside is that you will not have to sacrifice a chance at a river chop (if you get 3-bet). The downside of course is that you let the other guy draw cheap if you do have the best of it. If you do decide to raise, I would make it with the intention of not putting another bet into the middle (unless a T or maybe an ace hits). The other upside to raising is that it will be almost impossible for someone to take it to a 3rd bet without having a straight (which you are drawing dead to a chop chop). I can't really fault doing any of the 3 with folding being the worst against an unknown imo. The other two are interesting from a game theory standpoint and I'm not really sure which is better in this case.

Brad