[Leptyne]

You've got a pretty good flop with the biggest problem being OOP to the button. In a raised pot I'm not sure what the calling standards are. Could be such hands as suited connectors like JT, 76, or Axs. Of course your stright flush draw is good, but you have no idea if your straight or flush will be good. I think you have the right idea with an isolation raise. I think this hand begs for position against the small stack. And what kind of move is SB making with a weak lead instead of checking to PFR? When in doubt go with your first instinct, isolate the SB and push the button off his hand, assuming he has a hand.