I have expressed my preferences:
Saban
Jim Harbaugh
Art Briles
But, if someone were to hold a blow torch to my golf clubs, I realistically think it will come down to two candidates:
John Harbaugh - you nailed it when you said an NFL HC job just eats up the coaches time. It's almost 24 hours a day. NFL coaches very rarely get to see their kids grow up. However, college HC's have very little time themselves, but better than the NFL.
Art Briles - It depends on whether or not his interview with Patterson is a hit or not. If he is hired, there will most likely be backlash from a few of the old UT guard that haven't forgiven him for his vote - a few years ago. These guys have long memories.
Your report is excellent, by-the-way.