YES, the Nagano recording is quite good.  A little background info.  on
Busoni's opera from a paper I once wrote:

Of all the operatic settings of the Faust legend, Doktor Faust by the
German-Italian Ferrucio Busoni (1866-1924) is perhaps the finest and the
most complex.  Busoni had known the Faust legend for most of his life, and
had even been present at the rehearsals and performances of his friend
Boito 's Mefistofele.  Because of his experience with Boito's opera, which
originally was a setting of Goethe's complete drama, he "was well aware of
the almost impossible task of rendering the entirety of Faust into a
comprehensible and performable opera." As a result, Busoni chose to base
Doktor Faust on sixteenth-century puppet plays concerned with the Faust
legend:  "This choice immediately solved the problems of the opera's
duration and the obvious comparisons that would be made between the opera
and Goethe' s Faust."

Because of Doktor Faust's complex musical and philosophical implications,
a complete analysis of the work would be quite substantial.  Basically
stated, Busoni "used whatever style or technique he thought would be
the most effective in conveying the atmosphere of the work . . .  like a
master craftsman creating a finished work of art out of different alloys."
However, one style that Busoni did not allow to influence him was that of
Wagner-a musical style that he eschewed.  Even though Doktor Faust contains
musical motifs, they are not like Wagner's leitmotifs in that they have
no regular connection to the text.  Structurally, Busoni adheres to no
set model by using a mix of both individual numbers and complex
through-composed polyphonic sections.  Busoni also mixes diatonic,
chromatic, and modal harmonies throughout his opera.  Further, unlike
Wagner, Busoni gives the chorus a substantial role in his opera, "one that
approaches the multiplicity of purposes that Goethe envisioned in his
Faust."

Frederick Key Smith