In high school we did a two week tour of Italy. I can really recommend it to everyone. My uncle has taken my nieces for holidays all over Italy for 16 years to show all the nice places and art.
Fourthed - it's also a gorgeous museum, in that it's covered with beautiful Etruscan frescoes, and the grounds feel more ancient and down to earth without pandering. And it's pretty hard to find Etruscan artifacts, so it's a one-stop-shop.
Everyone forgets about the Samnites, who required Rome to fight 70 years before getting rid of them!