All just my personal opinion
Christmas Concert in the Semper-Aula of the ETH Zurich, 2016-12-06, commemorating Mozart’s death 225 years ago: Manuela Dumfart, Olga Privalova, and Thomas Hansen singing arias, duets and trios from Mozart’s operas, and three Notturni. Accompaniment: Prof. Josef Wallnig
W.A. Mozart, Symphony No.17 in G major, K.129 — Comparing two recordings (20 years apart) with the following artists: Christopher Hogwood, The Academy of Ancient Music (1981) / Jaap ter Linden, Mozart Akademie Amsterdam (2001)
Ludwig van Beethoven: Symphony No.7 in A major, op.92 — comparing recordings with the following artists: Bernstein/New York Philharmonic (1964), Bernstein/Vienna Philharmonic (1978), Böhm (1972), Dausgaard (2001), Furtwängler/Vienna Philharmonic (1954), Hogwood (1989), Kleiber/Concertgebouw (1950), Klemperer (1955), Norrington/RSO Stuttgart (2002), Toscanini (1951), Walter/New York Philharmonic (1951), Walter/Columbia Symphony Orchestra (1958), Zinman (1997)
Comparing recordings with the following artists: Christopher Hogwood, The Academy of Ancient Music (1983) / Jaap ter Linden, Mozart Akademie Amsterdam (2002)
Mozart: Symphony in B♭, K.22 — comparing recordings with the following artists: Christopher Hogwood, The Academy of Ancient Music (1982) / Jaap ter Linden, Mozart Akademie Amsterdam (2001)
Beethoven: Symphony No.3 in E♭ major, op.55, “Eroica” — comparing recordings with the following artists: Bernstein/New York Philharmonic (1964), Bernstein/Vienna Philharmonic (1978), Böhm (1972), Dausgaard (2006), Furtwängler/Vienna Philharmonic (1948), Furtwängler/Berlin Philharmonic (1952), Hogwood (1985), Kleiber/Concertgebouw (1950), Klemperer (1959), Norrington/RSO Stuttgart (2002), Toscanini (1953), Walter/New York Philharmonic (1941 & 1949), Walter/Columbia Symphony Orchestra (1961), Zinman (1998)