Beatles - Sgt. Pepper's Lonely Hearts Club Band, being a huge innovation in terms of actual techniques (if there were ONE album every decade that tried as much new stuff as this album, we would have found a way to bring instant sexual gratification to the listener just with the push of one button)
Devin Townsend - Terria (everything that could possibly be there is there, nothing that doesn't need to be there isn't, and the techniques are not only amazing in and of themselves but also some of the best examples I could find of how to suit the music)
Opeth - Blackwater Park (I couldn't find a better representation of any band out there than Blackwater Park - no way to improve it, period)
Honorable mentions go to Cynic - Focus (the remaster), everything by Frank Zappa (if he had been a painter, he would have done with jigsaw puzzles and inflatable toys what Michelangelo did with ceilings), and Pink Floyd - Wish You Were Here.
Jeff