We stayed at the best hotel we've ever visited overseas while in Rome - Marriott Palazzo Naiadi, The Dedica Anthology, Piazza delta Repubblica 47 Rome 00185, which is a block from the Metro, and also a block from the main train station. We booked a trip through
Dark Rome VIP Pompeii and Sorrento Small Group
which departed 7 am at the train station. All tickets, including train were included, and the meet up was a breeze. The Pompeii was an adults only trip, (chosen by my wife) and it was quite naughty. The navigation system GPS took on a whole new meaning. We had a great time. The Sorrento portion was by minibus from Pompeii, and was equally amazing. It was almost like a mini ABD. We returned to the train station quite late, but with great smiles.
We also did the Dark Heart of Rome City Wonders Ghost Walking Tour which was horrible, and at about 11:30 pm the guide disappeared, leaving us stranded without a clue where we were. I strongly recommend avoiding that one.