D4 in Milan?

you can find a list of retailers recommended by Nital, the official italian distributor, here:

http://www.nital.it/rivenditori/index.php

There is a list on the right where you can select the region (e.g. Lombardia for Milan, Toscana for Florence, Lazio for Rome). Or you can click on "Cerca il tuo punto vendita" for a complete list.

Nital products come with a 4 year warranty.