I would take Quinn over McC; however, the team has to perform poorly enough for McC to be fired or Quinn has to be OK with him being fired in order to keep him on as HC. I am not sure he would be OK with that.
No one knows what is in his heart because he has just about erased the being fired as a HC with his success as a DC and the job I think he really wants, Seattle, may not open up this off season. We also do not know about the relationship between McC and Quinn but Quinn has spoken highly of McC several times.
There is an unwritten rule in coaching, they do not interview for jobs while there is a HC employed. Cowher mentioned that and several echoed it. I wonder how that applies to this situation if Booger is faced with losing Quinn if he doesn't give him the HC job and would Quinn even go for that?