The Wall
Dazed and Confused
Both of these soundtracks get played a lot in my household.
My son is a HUGE Floyd fan and loves the variation on songs on the soundtrack vs. the studio album.
And as far as Dazed and Confused goes, it's one of the best collection of 70's songs ever assembled.
On a side note, the Beatles Yellow Submarine Songbook (soundtrack) blows away the original album. It's a bit of an unsung hero flying under the radar but what makes it so much better IMHO is the full representation of songs from the animated movie & the fact that they remixed/remastered all the songs. Apart from the Love album, which goes beyond simple remixing for Cirque du Soleil purposes (and an interesting ride in itself...), the Songbook is the only opportunity to hear a good swag of Beatles songs truly
remixed to modern standards. It's a nice musical adventure to experience the differences and I highly recommend it if the Beatles float your boat..