Not sure if this fits here but I had a really enjoyable day at Bestival a few years ago sat alone in my tent on a huge comedown weeping constantly as I listened to songs like 'U Don't Have To Call' by Usher. Not because they were sad, but because they were beautiful.
I was in floods of tears over the sublimity of the Neptunes.
In terms of transcendentally beautiful music, let me direct you to my Joni Mitchell worship thread.
re: Beethoven: never been a big fan of the 9th Symphony, irritatingly enough for me. This OTOH
However, I don't want to fill up luka's thread with a load of classical music. That's what my Desert Island Discs thread is going to be for.