We are planning our trip to Italy for next spring with one week in Rome and the other week split between Florence and Venice. Before we get to Venice, we are thinking we'd like to stay in Florence and maybe day trip to Pisa from there. We would love to input as to the AC hotel in Florence, or should we stay at another chain (sacrilege). Or how about staying in Milan, and using that as a central location for a few day trips? We won't be renting a car so will need easy access to trains. Advice needed please.