Juve is my favorite and the best team in Italy, while I consider Milan and Inter as second best. It's hard to say which of the Milano teams is better but I think Milan, as they have a bigger side to chose from and a better defence. In attack I think Inter are better, but only when Vieri, Crespo and Recoba are all fit and in good form. However, I think Cuper is a better coach than Ancelotti.
As I said, I think Juve are the best. They have the best(except Capello-he has had much success in several clubs, while Lippi only in Juve) coach, several great players all over the field and a strong determination and winning spirit. Also, they have a large team to chose from, so if one of the stars gets injured, it won't be any crisis like it would be for Inter if they got in that situation. The staff is among the very best in the world and the club doesn't have any problems regarding their financial situation.
Forza Juve!