I would vote for renting a car for a day or two to enjoy the Amalfi
We took the trains from Rome to Sorrento and used that as a fabulous
place for a base for Capri, Pompeii, Herculanuem, Vesuvius, etc. We
had planned to take a bus to Amalfi coast, but our hotel owner in
Sorrento talked us into renting a car for 2 days. Are we glad we
listened to her. We were able to stop at all of the overlooks,
explore areas that we would not have even seen from the public bus.
We drove up, up to Monte Pertuso, where we hiked and viewed
incredable vistas of Positano far below us. We drove and easliy
parked in Ravello. While driving was somewhat nervewracking (for me,
not my husband who was driving), you can stop often to enjoys the
views rather than zipping by them on the busses. We also found some
other areas on the Sorrento peninsula to drive (Marina Cantone, for
one) that were beautful, quiet, and memorable. We would not have
seen any of this without the car.
Donna in Pittsburgh