Wally Burnham would be the pick, based on successful experience defending the spread offenses of the Big 12.
We see firsthand what a "hot" SEC DC transported to the Big 12 will likely do. If you haven't seen it, watch the UT game films this year. If that's not enough, watch the K St. game that had McCoy go down in the 1st qtr-2006; that one was Chizik.
What We're Hearing -- Rumblings on Mack Brown, potential DCs