SRV & Double Trouble - Live At The El Macombo. Video is average, sound is above average, the performance is not of this earth. I am convinced that this dude sold his soul to be able to play the way he did. This DVD literally changed a part of my life, and how I approached my own guitar playing.
Blue Man Group - Complex Rock Tour. Video is average, sound is average, but the performance and the show is amazing, and so damn much fun to behold.
The Eagles - Hell Freezes Over. Video is slightly above average, performance is spectacular, but the sound, OMG the sound. The DTS track on this DVD is my absolute reference track for showing off my home theater system audio to guests. I have yet to hear a live concert DVD recording sound even close to as good as this one folks. No joke, check it out.