Philip Glass – "Knee 1" from Einstein on the Beach

Just the music, but if you're a Glass fan, who needs more?

Metric - "Sick Muse"

Just the music, although I hear there's an official video coming out at some point.

Vampire Weekend - "Cape Cod Kwassa Kwassa"

Vampire Weekend name-checks Peter Gabriel in this song, and he responded by recording a great cover with Hot Chip. Now that's one helluva compliment:

Ennio Morricone - Music from The Mission

As the YouTube poster relates, this is Morricone conducting the Roma Sinfonietta in 2007 at the United Nations. Carlo Romano is on oboe. The music is adapted from three pieces from The Mission score: Gabriel's Oboe, The Falls, and On Earth as It is in Heaven. I'll just add that Morricone is one of my favorite film composers, and "Gabriel's Oboe" is one of the most beautiful pieces I've ever heard.