I'm going to Italy in Feb. and would like to buy train tickets online. Where is the best site to buy them?

Should I order through Trenitalia? Eurorail? Railkey? Or somewhere else?I'm going to Italy in Feb. and would like to buy train tickets online. Where is the best site to buy them?
Trenitalia best bet !I'm going to Italy in Feb. and would like to buy train tickets online. Where is the best site to buy them?
Get them here:

http://www.trenitalia.com/en/index.html



I generally buy them online, and get an ID number. Then I print them at the station, using my ID on their automatic-machines. But you can even use SMS on your cell phone, I was told.



Enjoy your tour!