Great thread Quik. Some ones off the top of my head:
Jane's Addiction, "Three Days"
http://www.youtube.com/watch?v=SmvG2GZ3S7o
At 8:15 in when they drop out the drums and Navarro's guitar tone changes - the contrast just heightens the power of the section before and sets up the return to it a short bit later. I always visualize it as something powering forward and then all of a sudden the ground drops away and you're coasting in air until reaching the other side.
The Who, "Eminence Front"
http://www.youtube.com/watch?v=2_-Ue0LhVsI
The break at 2:54 always gets me. The song is essentially one beat, one guitar riff throughout, so when that break happens, it's a fantastic release of tension that keeps the song from feeling too static.
Soundgarden, "Superunknown"
http://www.youtube.com/watch?v=AwdjreJKggg&ob=av2e
At 3:52 as the bridge ends, Cornell sings "control" for the 2nd time and Thayil's solo kicks in - sublime moment. The bridge is a good release for the full-frontal assault of the rest of the song, and you can feel the tension building back up that explodes in the first several notes of Thayil's guitar.
The Sundays, "Can't Be Sure"
http://www.youtube.com/watch?v=yARVs1ZNLjU&ob=av2e
Harriet Wheeler's voice is a great instrument. Her little expressions found at 0:58, 1:41, etc. get me every time.
King Crimson, "Waiting Man"
http://www.youtube.com/watch?v=En6orVmjH6M
Great beat and rhythm throughout the song, but listen at 2:17 when Bruford locks into a solid beat on the snare, but then at around 2:25, when you think the groove is locked, he decides to shift the beat to keep you on your toes.
Michael Jackson, "Don't Stop Till You Get Enough"
http://www.youtube.com/watch?v=yURRmWtbTbo&ob=av2e
This will always be one of the most danceable songs ever produced. I love the little touches Quincy Jones puts in the production of this track, especially the extra tom-tom beats at 1:21, 2:25, 2:57, etc. The bridge sounds very dated though, about the only thing that doesn't hold up.