I will say, for the casual Bernstein person, the 10-CD set is incredible, original jackets, plus it has stuff that isn't in this new set - several classic mono recordings (those I kept in iTunes) including the original recording of The Age of Anxiety with Lukas Foss at the piano, which I MUCH prefer to the later stereo recording, in which the pianist convinced Bernstein to add to the final movement in ways that kind of wreck it. So, there's that.