As a collectors Item the double vinyl LP at Trade Mark of Quality label is the best buy overall... the DVD-Audio at Genuine Masters GM-LZ-04.09.1970-DVD has the best sound (I think). There is also a Blu-Ray 5.1 version in circulation based on a remaster of the original reel-to-reel tape. I heard the BD-version at a rock club in Berlin, Germany last summer. FANTASTIC SOUND!