Most achingly-beautiful music

Jeff Buckley - Lover You Should Have Come Over.

For lyrics, melody, and arrangement this is hard to beat. The opening lines:
"Looking out the door I see the rain fall upon the funeral mourners
Parading in a wake of sad relations as their shoes fill up with water
And maybe I'm too young
To keep good love from going wrong
But tonight you're on my mind so..."

The bridge, which swells with a gospel choir, is almost overwhelming:
"It's never over, my kingdom for a kiss upon her shoulder
It's never over, all my riches for her smiles when I slept so soft against her...
It's never over, all my blood for the sweetness of her laughter
It's never over, she is the tear that hangs inside my soul forever"

He could write like Leonard Cohen, and sang like an angel.

I second the vote for the Rachmaninoff 2nd.Symphony. However, I must correct "Tubegroover". The part you love is actually the 3rd. movement, not the 2nd. Irishdog.

1. Steven Stills-"Singin Call"
2. Robin Trower-"Bluebird"
3. Steely Dan-"Turn That Heartbeat Over Again"
4. Moody Blues-"Dawning is the Day" (sorry about that, it's criminal to limit it to three!)

Emmylou Harris
Wrecking Ball

1. Mozart, Piano Concerto No. 20 - a piano concerto with most beautiful theme
2. Scorpion, "We'll Burn the Sky" from Live from Japan (?) album - Easily the best song by the band
3. Armstrong, "What a Wonderful World" - ahhhh...
4. Francisco Tarrega, "Recuerdos de la Alhambra" - overplayed but still achingly beautiful
5. Led Zeppelin, "Stairway to Heaven" - since no one else seems to have mentioned it...
6. Chopin, Nocturn - pick any of 'em. really.

too many to list