I would add Cracco in Milan
...and Osteria Francescana in Modena.
I've not been to Cracco yet, but I would definitely second Francescana. Fantastic restaurant.
And while we're in Italy, also:
Uliassi in Senigallia (my favorite restaurant in Italy)
Madonnina del Pescatore in Senigallia
Le Calandre in Sarmeola di Rubano (my one meal there was not consistent with the glowing praise you can read elsewhere, though..)
Combal.Zero in Rivoli
Il Canto in Siena
(I've not been to the last two but they come very highly recommended by a friend of mine who lives essentially halfway between them. He called the chef of Combal.Zero one of the best two chefs in the Piemonte (no small praise), and the chef of Il Canto, a disciple of Marchesi, among the very best young chefs in Italy.)