I think Durkin may hold out a bit longer. I don't think he's quite ready for the real biggies like Georgia, Miami (and believe me with the right coach, playing in the ACC in that talent-rich area they turn around in a flash) or USC (if it was still available) and I don't see him settling for basement rebuilds like Maryland or Rutgers. South Carolina, maybe is an option.
Georgia and Miami will go big (another seasoned, successful coach at a lower tier school like what Washington did with Peterson) or hiring a visible coordinator from a top-10 college school or dipping into the pros for someone who wants breathing space (i.e. Chip Kelly).