Obviously I'll advice you for a fast trip to Maranello-MO (Ferrari Gallery), Campogalliano-RE (Bugatti), and S.Agata Bolognese-BO (Lambo) , Borgo Panigale -BO (Ducati, I guess those guys are still in the party
, all places closed in 50-60 Km and I believe 100 or so from Brescia.
BTW there's an interesting exibit at Milan this WE, the Hobby Expo at Novegro Park, just near Linate airport at Milan.
There's also an interesting car museum at Verona, 50-60 Km close to Brescia, I'll check the address if you have the chance to move, and another interesting temporary exibit at Bassano del Grappa (200 Km close to Brescia approx) at the Bonfanti's car Museum, with a Racing Maserati monography.