Do not know how close you are going to Bologna but would recommend some automotive excursions:
Ducati museum is great, not done Moto Guzzi factory at the Lakes its seemingly interesting, other options would be Maranella and obviously the Pagini factory.
The Italian lakes are an absolute must. Must admit that I was not that impressed with Pisa so would not really recommend it. Just a long tall thing thats squint with far too many tourists.
We always book our Italian accomodation through the following:
http://www.sawdays.co.uk/
Milan is always good, couple of touristy things and great for shopping, popping across in a couple of weeks times as I promised the wife she can get her outfit from there for my sister wedding
Do not know if you will be close to Verona but they do evening operatic performances, if you wish to be uber romantic. However they sell out pretty fast in summer.
Cheers
DMW