Since you are interested in Beethoven : Barenboim [35 CD set], here is a list of other items that you may find interesting.
W. A. MOZART
Mozart: Piano Concertos (Complete) / Rondos K382 & K 386 [12 CD set] Murray Perahia (piano & conductor) / English Chamber Orchestra [ Sony Classical Masters / 12 CD Box Set - released 20/May/2012 ] "An indispensible set in every respect." Penguin Guide Rosette Recording / GRAMOPHONE MAGAZINE 100 GREATEST RECORDINGS OF ALL TIME |
J. S. BACH
Bach Trios Yo-Yo Ma (cello), Chris Thile (mandolin), Edgar Meyer (double bass) [ Nonesuch / CD - released 20/Jul/2017 ] "Thile and Meyer, with their backgrounds in bluegrass and American roots music, bring an appealing swing and spontaneity to the Bach…Ma draws a glorious palette of sounds from his cello, which sings and weeps and whispers" Five Stars BBC Music |