The first set I heard and became familiar with was the Kondrashin. It is expensive but absolutely worth it. I doubt we will ever hear another complete set like this. I prefer mono and early stereo so the sound is perfect for me. I like a dry mix. And its importance as a historical document can't really be contested. Short of early Mravinsky, this is it. While I enjoy Barshai's set very much, the Kondrashin is in a league of its own.