A couple of years ago, our friends had all their songs on Spotify or something like that
and were bummed when they found they only had 5 songs actually on their phones.
This worked out good for me in that my music was pretty much all that was available
and I like all the songs on my list better than theirs.

Agree that 6.5 hrs is not near enough to avoid redundancy

You might consider:
Hank Williams, "The Lost Notebooks"
Thelonius Monk, "Straight, No Chaser"
Diana Krall, "Live in Paris"
Stones, "Exile on Main Street"
Armstrong/Fitzgerald, "Porgy and Bess"
The Band, " The Last Waltz"
Definitely like the suggestion for the Dead and Phish and I'm going to look
into Moe (thanks for that)