Shannon is a tougher call, but I lean towards preferring him as well. His record at Miami is a major red flag, but he was in charge of cleaning that program up and did accomplish that goal. I think Shannon's knowledge of Florida would be extremely beneficial in recruiting and I also thing that having the only African American head coach in the Big Ten would provide an advantage as well. If Shannon could have brought some of his staff from Miami and continued to win recruiting battles (though not as often as he did at Miami), I could see him being successful.
I have a hard time seeing Jerry Kill ever doing better than 5-3 in the Big Ten. I think it's extremely likely that he has a better record than Shannon would have, but I don't see a real chance of success. I really don't want to go through a decade of 2-6 to 5-3 again while never making a change at the top. I hope I am wrong and Kill does have an upside that I am just not seeing.