Averaged 8 wins/year after making the jump to the Big 12, went to 7 bowl games in 10 years including two 11 win seasons, a 12 win season, 2 Alamo Bowl Wins and a NY6 bowl win (arguably got screwed out of the playoff that year).
Obviously has very strong DFW connections, is a name brand coach would bring the "football adult" back into the room that the program hasn't had since Barnett, get the Buffs defense back to respectability and could focus on hiring an dynamic OC. Who knows, maybe bring Brennan Marion from Texas as OC (Patterson is assistant to Sark at UT right now).
I'm sure he has options, but I feel like a low pressure situation like CU that would be extremely happy if he produced TCU-like results, would be a great fit for both sides.