Most achingly-beautiful music

Portions of Pink Floyds "Final Cut" catalogwiz

Joe Jackson's Nocturne, Jimi hendrix Castle's made of sand, Savatage's St. Patricks cathedral and Queensryche's Someone else.

Kenny G plays Enya's greatest hits. One can only dream of that much aching. How about the 2nd movement(adagio) from Ravel's piano concerto in G as an alternative?

A question too difficult to answer. But I'll list a few: Middle and Late Beethoven quartets; Mahler and Bruckner adagios (adagietos); Wagner Tristan and Isolde; Schubert and Brahms Lieder; Sibelius 6 and 7, certainly the Barber adagio; Sibelius and Bruch vln. concerto; Brahms vln and clarinet sonatas; Dvorak cello con.; Brahms Requiem; Ravel and Debussy quartets; Bach cello suites; Bach violin sonatas & Partitas; Mozart Sinfonia concertante; and much much more. Also; many film scores and a number of popular songs. Picking only three would be too great a sin of omission.