Why are people mentioning Ferrara? Just because he was a great player doesn't make him a great manager, especially considering his lack of experience. Look at Guardiola in Barca. Rijkaard and Mancini were great players as well, but they are not excellent managers. If Ferrara had a decent track of managing clubs, I'd give him a chance, but as of now let him gain his managerial experience somewhere else first.
My first choices are Prandelli and Benitez, and quite frankly both of them are realistic options (at the end of the season)
I would not mind Avram Grant or Bernd Schuster either.