I know I'm going to sound bat-shit crazy and bammeresque, but here goes:
1. Spurrier. I'm not saying he'd come, but frickin' a, I think he's the best coach in the college game and I'd silently make him an offer behind the scenes to see if he'd be interested. If he's not, I'd move on to
2. Chris Peterson (Boise State). This is the guy I wanted to take the OC reigns the year we hired Borges, and I still want him at Auburn. I would make him either keep Muschamp on board or hire the next best DC out there, but this guy has a great offensive mind, and I think he'd stay for the long haul (as long as he wins, of course). If he said no, I'd go for
3. Muschamp, or perhaps Bo Pellini. I like the idea of having a defensive-minded HC (like CTT), and I think both of these guys are going to be great HC's in the near future. I love Muschamp's passion, but I'm not sure how that would carry-over to the HC's job.
Honestly, I wouldn't be upset to see Petrino come back to Auburn as long as we locked his ass in a contract with a high buyout, similar to CTT's. Again, make him hire a proven, kick-ass DC.