Personally I feel Moyes kind of lacks big club experience. He's done a phenomenal job at Everton though. He may do fantastic at Man Utd too, however I can't shake the feeling that it's a huge risk compared to if they just went out and got Mourinho.
I feel Mourinho want's to settle down for a long stint now at an English club, he has never hidden his love for managing in England and always talks about his desire to come back, so I thought everything would line up.
Going to be very interesting to see how it all unfolds, however if I were a United fan I would be feeling pretty uneasy at the risks involved with going for Moyes.