I think most of the posters enamored with "young Turks" with not enough experience are forgetting the job description of a head coach. Simply put, a head coach is someone that is basically an administrator. I sometimes think of Tommy Prothro, who would arrive at a UCLA game wearing a suit and carrying a brief case as an example of clothing fitting the position.
A head coach requires leadership skills, organizational skills, evaluative skills, and a demonstrated ability to put together the essential parts of a football program. These are the chief functions. Arguably, the most important decisions a head coach makes is choosing an offensive coordinator, a defensive coordinator, and if appropriate, an associate head coach. You guys are really talking about hiring an offensive coordinator for a head coach position who is not adequately prepared and learns on the fly. Some guys can do that but I think they are the exception and not the rule. There's no substitute for experience and we need an experienced head coach who will likely stay for a while. Coach Mac comes to mind as an excellent prototype. Of those mentioned, Ed Orgeron stands out. He has past warts that can cloud your perceptions of him, but keep in mind that many learn from their mistakes.