Since Neil Young already has a popular poll for his live albums, I thought I wouldn’t complicate things by trying to combine them to get the full CSN&Y all their albums appear in the Crosby, Stills and Nash poll.
What is The Best Crosby Stills & Nash Album

What Is The Best Classic Rock Live Album?
I’ve classified CSN&Y as a classic rock group so you might want to vote for their albums in that poll.

You can see the complete list of readers polls at Live Album Polls.