IMHO, Florence for as much time as you can find. So much to see. You cant do it in one day, but its a start. Such a special city. Its a museum with multiple museums inside. Pisa is more than just the Leaning Tower, but I personally prefer Lucca. Like a small version of Florence. You can walk on top of the walls, its a busy commercial town with great architecture and food. We have a stop in Nov. and that is our plan. I've been to Florence a number of times and while I love it, prefer not to spend several hours of my day in a bus...