I plan to visit 3 countries in Europe during May: Paris, Italy and England ( in that order). I will be staying in each country for 1 week; at the end of the week I will be moving on from a country to another.
Edit: Here are more updates on my research. This is my travelling schedule:
I plan to use Eurail pass when I travel from Paris to Rome, and I will take a flight from Rome to London.
My question is, is it more worthwhile to by a Selected Pass with three countries ( because the train from Lyon to Milan stops by Geneva), or is it more worthwhile to buy the ticket separately?