If you can find original pressings of the first 3 Peter, Paul, and Mary albums on Warner Brothers with the gold label (later pressings are green) you'll be amazed at the clarity and dynamics. I'm not saying I'm that old but I've been told this is true. :-)
The second (Turn, Turn, Turn) and fourth (Younger Than Yesterday) Byrds albums can also be very very good.
The second (Turn, Turn, Turn) and fourth (Younger Than Yesterday) Byrds albums can also be very very good.