Since my new Axioms are driving an incredible elevation in my interest in music, I have been haunting CD stores and various web resources researching CDs. While I knew there were music videos out there, I was amazed at the number of music DVDs that I have come across. I borrowed Santana - Supernatural from a friend and it was interesting.

I'm wondering if these music DVDs offer anything better than CDs. Obviously there is the visual addition. Am I correct in assuming that the audio comes in richer options than CDs? What are the plusses and minuses of DVDs vs. CDs?