We will be in Rome for 5 days (next week). We are primarily interested in all of the Ancient Rome sites, the Capitoline and National Museum, St. Peter and the Vatican. Is it worth it to pay more for the Archeologia Pass or is the Roma Pass better, since it includes 3 days of transportation (all we'll need, since we're within walking distance of most things). Thanks!
"The Archeologia Card, or archeology card, is good for seven days from the first use. The Archeologia Card includes admission to the Colosseum, the Palatine Hill, Roman National Museum sites, the Baths of Caracalla, the Villa of the Quintili, and the Tomb of Cecilia Metella on the ancient Appian Way."
Whereas, of the sites you listed, the Roma Pass covers the Colosseum, Capitoline Museum, and National Museum. 2 will be free, 1 has a mild discount. Note that the Colosseum entry includes Palentine Hill & the Roman Forum, and all three count as one free entry.
No passes cover the Vatican. St. Peters is free, unless you go up (dome) or down (crypts).
It's a bit close in your case. I, personally, would probably go with the Roma Pass for the 3-day transit pass alone. Walking is nice but you never know when you might get tired and really prefer to take the metro or bus.