I don't want a college coach who is untested in the NFL. They end up being busts more often than brilliant. as far as commentators leaving the booth to coach, Jimmy Johnson would be the best bet. There have been a few times this season - both at the beginning of the season and the last few weeks - where he has made comments along the lines of "any coach would like to have the talent on this team" and "I've been to the Super Bowl with less talent than the Lions have" [[those are paraphrases, the last from either last week or the week before).