I burned what would have been Duke Ellington Masters of Jazz vol. 13 for myself. After playing vol. 1 to 12 I finish with vol. 13. Vol 14 and further are on the 2 Mosaic boxes and the big RCA box. For me no need to burn more CD's.
At the recommendation of the trusted few, I bought the download via Prostudiomasters. I think it is indeed asonic upgrade albeit not a dramatic one. This one is warmer, fuller and a little more precise to me.