My husband and I are planning on leaving Rome on the morning of May 8th and taking the train to Florence. I had originally planned to spend the rest of that day just walking around Florence and taking in the sights. On the next day we planned to visit Uffizi and Accademia. On the final day we were again going to spend the morning shopping and seeing other sights before taking a train to Venice. However, I am now wishing I had left some time in there to visit Siena. Is it advisable to rearrage things to take a half day trip to Siena, or should I just leave that for another trip? This is our first time going to Italy and actually our first time going to Europe, so I'm not sure how much I should pack into one visit.