As for the discs...I have a several dozen discs at home in a section of my collection which I call, "It's Stereo." It includes everything from games of Ping Pong to choruses moving from the left to the right speaker, also a series of discs on RCA, the LSA series plus electronic works like Stockhausen's Kontakte which made heavy use of panning.
Most of these are especially fun listening with headphones.
Karl