How Would You Visit Israel

This is a real question. My parents are looking into a trip to Israel, and I have only gone on student trips. Do you know of any good tours or companies? Should they just do it themselves? My father has never been, and my mother has not been in nearly 30 years.

If it were me, I would just tour myself, as I have seen nearly everything and have family and friends around the country that I have become close with. My parents, however, want to make it to tourist sites around the country. They have a week to do it all.

Any ideas or suggestions?