I own several versions of this concerto, arguably Mozart's finest.  Soltzman's is absolutely terrible.  I have always had an issue with his sound - his tone is harsh, nasal, and not suited to any music that requires delicate phrasing and beauty.  David Shifrin, on the other hand, is an absolutely brilliant artist.  An artistic director for the New York Philharmonic and director of several music festivals, David Shifrin is a deeply committed musician.  And it shows in these sensitive readings of the Mozart concerto and quintet.  His tone is absolutely astounding.  It's sweet, mellow, and delightful to listen to.  He uses an extended-range clarinet as Mozart intended and the result is delightful.  This is a wonderful CD and, as a clarinetist, I cannot recommend it more highly.