GEROSA DESIGN is a recommended showroom: 
Alias, Arper, B&B Italia, Boffi (New Partnership), Cappellini, Cassina, DePadova, Desalto, Driade, Ernestomeda, Fiam Italia, Flexform, Flou, Fritz Hansen, Kartell, Kasthall, Knoll International, Maxalto, MDF Italia, Paola Lenti, Poltrona Frau, Porro, Rimadesio, Riva 1920, Vitra, Zanotta…

and also:
Bontempi Casa, BPA International, Casamilano, Coro, Frigerio, Glas Italia, Inda, Lapalma, Mobileffe, Pierantonio Bonacina, Simon, Tisettanta, Unifor, Vibieffe...

Lighting:
Artemide, Cini & Nils, Flos, Fontana Arte, Foscarini, Fabbian, Ingo Maurer, Leucos, Luceplan, Lumina, Oluce, Pallucco, Ribag, Santa & Cole, Status...