Stax-Volt Volume 1
Stax-Volt Volume 2
Stax-Volt Volume 3
I just recently got all 3 of these and they are some of the best 25-30 CDs of music ever made. I load them all in to Winamp and shuffle and it's like a kickass soul oldies station that plays stuff you never heard in your life. I had never known of artists like Carla Thomas, William Bell, and Barbara Stephens, but they are nearly the equals of Otis Redding or Etta James. Highest possible recommendation.