Gundy and Fedora would be my first two picks out of these three.  
I don't see Gundy leaving OSU.  He is an alum and OSU has deep pockets.  He is probably just using this to get a raise.
Fedora being in his first year, it is hard seeing him leaving, but I would be good with this pickup.
Strong, not my favorite candidate, but I have warmed up to him after reading more about him.  
If we strike out on all three, who is next??  Petrino? Tressell?
Patterson and Petersen are the guys I would want, but I don't know if there is any chance to get them.