Where does Boston go after Francona?

My initial intentions were to blast the Boston Red Sox for letting manager Terry Francona go after their 2011 season ended this week. I would have had many reasons, being he led the Red Sox to the teams only 2 World Series wins in the last 93 years. Also throw in the underrated fact that he had a winning record every year he was there, not an easy accomplishment, even with the payroll flexability that some teams don't have. I think its safe to say, that even without the World Series championships, Francona managed one of the most successful runs in Red Sox history. But obviously with Francona stating that he couldn't do the job anymore, the decision seems more like him leaving on his own rather than being forced out. (We may never know for sure.)
All that being said, it seems like theres an extremely enviable job opening. ESPN's Buster Olney is already reporting the Red Sox interest in Bobby Valentine. I want to throw in some other suggestions; how about Bob Brenly? A broadcaster now after a short but successful stint as the Arizona Diamondbacks manager. Dave Duncan has been on a leave of absence from the Cardinals lately, but assuming he comes back he would be certainly deserving of a managerial opportunity. A couple of recent pitching coaches, Bud Black and John Farrell have gotten managerial jobs, so why not Duncan- the best pitching coach in the game. And I'm sure he would have answers for some of the struggles and breakdowns of the pitchers of the past September. Joey Cora may get an interview, but he's probably the front runner for the White Sox job, the only other vacancy in MLB. (Assuming Davey Johnson comes back to Washington.)My suggestions are Duncan-1 and Brenly-2. Primarily because i think Valentine has finished managing. Who else do you think can emerge as the Red Sox next manager?