I have stayed at The Inn at the Spanish Steps.(
www.atspanishsteps.com) It is run by Karina who used to be on Diamond and Navigator. Her husband, Danilo, was the keyboard/acordian player at Don Vito's and the Navigator Portofino's Italian restaurant with Jerry Vasi. (Luxury but small.)
I have booked Bob's Limos for transfer between Fiumicino airport to Civitavecchia port on November 2nd. Will let you know how it goes.. Cost 71 Euros.