I don't know enough about the US national team so can't comment on the finer details. What I will say, and no disrespect to Americans, is they need a European manager but not Italian. The players are beginning to play the attacking European style rather than than the 'defense!! defense!! defense!!' style of years past. The talent pool is excellent now so the last piece of the puzzle is a manager to work with their skills.
If you look at the succesful teams, even at club level, they all play the style to suit the players, not coach the players to suit the style the manager wants. (Rednapp, Mourinho, Daglish, SAF etc.)
I'd say a German, Scottish or Dutch boss. The pool of English bosses right now is pretty much dried up for now.