Pink Floyd - Live at Pompeii
Pink Floyd - Pulse
Joe Satriani - Live in San Francisco
Joe Satriani - Satchurated: Live in Montreal
G3's DVD's (the ones with Eric Johnson and John Petrucci are my favorites)
Ozric Tentacles - Live at the Pongmaster's Ball
AC/DC - Live at River Plate
Between the Buried and Me - Colors Live (don't like it much these days, but I used to watch this quite often, it's a good performance)
Snarky Puppy - We Like it Here (instrumental jazz / progressive rock / funk ensemble of the highest order). Watch this:
https://www.youtube.com/watch?v=fuhHU_BZXSkMetallica - S&M
Led Zeppelin - DVD
Jimi Hendrix - Live at Monterey (blu-ray) - I watched this last night and the sound quality is incredible. A must see if you're even remotely interested in Jimi Hendrix
John Mayer - Where the Light Is
It's not a secret that Porcupine Tree's concert registrations are brilliant. Also really like Evergrey's DVD.