Who should take over as Manchester United manager if Ferguson retires?

Depends on the Board and their long-term priorities. More Prem titles, a red nosed Brit. For a better continental run, a quality coach from somewhere else in Europe. To get a good balance you can have both as Manager and istant. If United had a better istant than Carlos I bet the team would have picked up one or two more Euro cups and if Liverpool had a solid Brit isting Rafa I'd also bet they would have snatched at least a Prem title by now.