Because of the 2 tracks mentioned by Medjuck above.
While I do have the Mosaic set, I frequently grab "The Best of" to hear a track or two. It is just easier.
I wasn't able to attend the opening but just before the paintings were carted off to Chicago Roscoe gave Ann and me a "Facetime" tour of his house to see the works. Pretty astounding. A copy of the catalog arrived in today's mail.
Hope to get to Chicago while it's still on.
Great performances. I had most of this on lp back in the day, replaced them with early cd editons and currently have them in the BIG box.
After the Brahms, I tend to gravitate to the Schubert trios.