Choose Rome
+1 for the Rome Cavaleri
This place is amazing. Ask for a upgrade to the Concierge floor though you probably have to pay for it now days. It is an amazing view of the Vatican Dome from your room and the Lounge is second to none.
If your going to rome, take the train to Florence as it is quick. Don't miss Sienna either. You will not regret any of these suggestions. One thing about Rome, don't be put off by the Graffiti as Rome is a very old city and there is a lot of graffati about. Once you look past it, Rome is a remarkable place but Sienna will flat blow you away. Florence & David will too.
Hawaii can wait.