I just got a quote in from the agent Im dealing with - �2500 each for 18 nights, bed and breakfast, honeymoon rooms (with sea views etc),transfers, flights, first class rail (from Rome to Florence and then to Sorrento). There are extras thrown in such as champagne on arrival in each hotel, chocolates, fruit one dinner somewhere.
I think this is ok? Someone I know used same agency for both wedding and honeymoon and was very happy with costs etc. I had bugeted about 3400e each (didnt let the agency know that though!).