Not for Italian, but I use a US keyboard layout with the addition of German umlauts behind right alt + letters (as well as right alt + ' and right alt + ` being dead keys to put accents on letters for foreign words). I find this much better than the standard German layout which puts all of @{[]}\~ behind right alt - and most of them on the right side of the keyboard too so you have to akwardly hit the right alt + combo with a single hand.