What is the best train to take if we want to travel between Florence, Milan, and Venice Island?

The best way to get very quickly from Milan to Venice is ti take the "Frecciabianca"; the journey will take about 2h30m and the ticket price is 45€(1st class) and 32,50€(2nd class). A cheaper way would be taking the regional train but in this case the trip will last a bit more:about 3h30m. cost:25,50€(1st) 17€(2nd). On the other hand to reach Florence from Venice you have to take the "Frecciargento", which is very fast ( about 2h for this trip) but is slightly more expensive:60€(1st) 43€(2nd). For further information and timetables refer to Trenitalia(national railways company) website: http://www.trenitalia.com/cms/v/index.jsp?vgnextoid=ad1ce14114bc9110VgnVCM10000080a3e90aRCRD (you can set the language on english) Hope this will help :D