We have 9 nights to spend in Tuscany - starting in Vignamaggio and flying out of Pisa. We hope not to rent a car and so are keen to take buses/trains. I have been looking to a route including Florence, Siena, Lucca and Castiglioncello (for a beach break) but I'm unsure as to which of these destinations we should go for or which other cities/towns we should visit. Any suggestions would be much appreciated.