I've got too many versions of this piece, but I heard a gorgeous rendition of the old standard, Barber's Adagio for String on the radio... played so slowly and mournfully. But key was the fact that it was a string quartet version, a concert by the St. Louis Quartet. Each instrument cried. Not being able to find a recording at Discogs, I thought I'd ask here for a recommendation for a slow paced string quartet recording. Vinyl preferably.