Hmm, ok now it gets difficult. I'm choosing between
Stolarz, Aube-Kubel, and Leier.
I think Leier is a real decent bet to have an actual career as a bottom 6 winger. Aube-Kubel I've never really seen play. I remember seeing him during the Memorial Cup broadcasts, but wasn't paying enough attention to have an opinion. Aube-Kubel has a good pedigree and when the Flyers take a forward in the 2nd round from the Q, everyone should pay attention.
I'll vote Stolarz because I've seen enough of him to mildly like him now and definitely see his upside. People probably don't realize just how little experience he has for a prospect of his caliber. I can see him having some rough patches this year in the AHL, but that is ok. His overall upside is just a lot higher than NAK and Leier, so he's my pick here. If you chose one of the other two here, I can't argue against it.