It looks like your question is well answered. One other suggestions would be to pick up a guidebook specifically on Beatles sites. "The Beatles London" by Piet Schreuders is a good one. Here is an excerpt from Rick's current England guidebook on a couple of tours to consider in Liverpool.
"If you want to see as many Beatles-related sights as possible in a short time, these tours are the way to go. Each drives by the houses where the Fab Four grew up (exteriors only), places they performed, and spots made famous by the lyrics of their hits (“Penny Lane,” “Strawberry Fields,” the Eleanor Rigby graveyard, and so on). Even lukewarm fans will enjoy the commentary and seeing the shelter on the roundabout, the barber who shaves another customer, and the banker who never wears a mack in the pouring rain. (Very strange.)
Magical Mystery Big Bus Tour--Beatles fans enjoy loading onto this old, psychedelically painted bus for a spin past Liverpool’s main Beatles landmarks, with a few photo ops off the bus. With an enthusiastic, live commentary and Beatles tunes cued to famous landmarks, it leaves people happy (£16, daily year-round at 14:00; also at 11:30 daily April-Oct, off-season weekends, and school holidays; often at other times as well--ask TI, call, or check online for schedule; 1.75 hours, buses depart from the Albert Dock near The Beatles Story and TI, tel. 0151/236-9091, www.cavernclub.org). As these tours often fill up, you’d be wise to book at least a day ahead by phone or through the TI (tel. 0151/707-0729).
Phil Hughes Minibus Beatles and Liverpool Tours--For something more extensive, fun, and intimate, consider a four-hour minibus Beatles tour from Phil Hughes. It’s longer because it includes information on historic Liverpool, along with the Beatles stuff and a couple of Titanic and Lusitania sights. Phil organizes his tour to fit your schedule and will do his best to accommodate you (£20/person, private group tour with 5-person minimum, can coordinate tour to include pickup from end of National Trust tour of Lennon and McCartney homes or drop-off for late-day tour starting at Speke Hall, 8-seat minibus, tel. 0151/228-4565, mobile 07961-511-223, www.tourliverpool.co.uk, [email protected])."