This is simply a list of the most outstanding recordings I know, in alphabetical order by composer and then opus number (or name if no opus number), updated periodically - last update 25 January 2012. In a some cases individual movements are outstanding and listed - that indicates some other part of the performance is not of the same standard. Links on the title mean a more detailed review has been given in another post. If a date is given it means that more than one recording by an artist is available and the date is the one referred to.
The aesthetic approach in selection is indicated in the quotation under the title of this blog.
Bach - Ich habe genug, Cantata 82 BWV 82 - Fischer-Dieskau/Ristenpart 1951
Bach - Chromatic Fantasia and Fugue in D minor BWV 903 - Alessandrini
Bach - Partita for solo violin no.2 in D minor BWV 1004 Ciaccona - Kogan
Bach - Harpsichord Concerto in D minor BWV 1052 - Alessandrini
Beethoven - Piano Sonata 14 in C sharp minor op.27 no. 2 'Moonlight' - Kempff 1956
Beethoven - Piano Sonata 14 in C sharp minor op.27 no. 2 'Moonlight' - Serkin 1951
Beethoven - Symphony 3 in E flat major op.55 - Toscanini 28 October 1939
Beethoven - Piano Sonata 23 in F minor op.57 Appassionata - Kovacevich
Beethoven - Piano Sonata 23 in F minor op.57 Appassionata - Richter 1959
Beethoven - Symphony 4 op.60 in B flat - Carlos Kleiber
Beethoven - Coriolan Overture op.62 - Furtwangler 30 June 1943
Beethoven - Coriolan Overture op.62 - Toscanini 14 December 1946
Beethoven - Symphony 5 in C minor op.67 - Carlos Kleiber
Beethoven - Symphony 5 in C minor op.67 - Klemperer 1955
Beethoven - Fidelio op.72 - Walter 22 February 1941
Beethoven - Piano Concerto 5 in E flat major op.73 - Michelangeli/Giulini
Beethoven - Piano Concerto 5 in E flat major op.73 - Serkin/Bernstein
Beethoven - Symphony 7 in A major op.92 - Carlos Kleiber
Beethoven - Symphony 7 in A major op.92 - Klemperer 1955
Beethoven - Piano Sonata no.28 in B flat major 'Hammerklavier' - Richter 1976
Beethoven - Missa Solemnis in D major op.123 - Toscanini 30 March - 2April 1953 (LP Version - Pristine Classical transcription)
Beethoven - Symphony 9 in D minor op.125 - Furtwangler 22 August 1954 (Pristine Classical transcription)
Beethoven - Symphony 9 in D minor op.125 - Toscanini 2 December 1939
Brahms - Piano Concerto 1 in D minor op.15 - Serkin/Szell
Brahms - Piano Quartet 1 in G minor op.25 - Stern/Laredo/Ma/Ax
Brahms - Piano Quintet op.34 - Curzon/Amadeus Quartet
Brahms - Symphony 1 in C minor op.68 - Szell 1 March 1957
Brahms - Symphony 1 in C minor op.68 - Toscanini 6 May 1940
Brahms - Symphony 4 in E minor op.98 - Carlos Kleiber
Brahms - Symphony 4 in E minor op.98 - Klemperer 1956-7
Brahms - Symphony 4 in E minor op.98 - Toscanini 3 December 1951
Brahms - Vier Ernste Gesange op.121 - Fischer-Dieskau/Klust 1949
Chopin - Piano Concerto 2 in F minor op.21 - Pires/Previn
Chopin - Nocturne 7 in C sharp minor op.27 no.2 - Rubinstein 1936
Chopin - Nocturne 13 in C minor op.48 no.1 - Pires
Haydn - Symphony 94 in G major 'Surprise' Hob. 1:94 - Karajan 1981
Haydn - Symphony 94 in G major 'Surprise' Hob. 1:94 - Carlos Kleiber
Mahler - Symphony 1 in D major - Horenstein 1969
Mahler - Symphony 2 in C minor - Klemperer 1951 Wiener Symphoniker
Mahler - Symphony 2 in C minor - Stokowski
Mahler - Symphony 3 in D minor - Horenstein
Mahler - Symphony 6 in A minor - Tennstedt 1991
Mahler - Symphony 9 in D major - Walter 1938
Mozart - Sinfonia Concertante in E flat K.364 - Mutter/Bashmet
Mozart - Piano Concerto 20 in D minor K466 - Curzon/Britten
Mozart - Piano Concerto 27 in B flat K595 - Curzon/Briten
Prokofiev - Romeo and Juliet - Rozhdestvensky
Puccini - Madama Butterfly - Karajan/Callas
Puccini - Tosca - de Sabata/Callas
Schubert - Symphony 8 D759 - Mravinsky 1978
Schubert - Piano Sonata in A min D784 - Richter 31 March 1979
Schubert - String Quartet 14 D810 'Death and the Maiden' - The Lindsays
Schubert - Symphony 9 in C major D944 - Bohm
Schubert - Symphony 9 in C major D944 - Boult
Schubert - Symphony 9 in C major D944 - Toscanini 1941
Schubert - Symphony 9 D944 (Movements 1&2) - Sinopoli
Schubert - Schwangengesang D957 - Hotter
Schubert - Standchen D957 - Volker
Schumann - Etudes Symphoniques op.13 - Richter
Schumann - Dichterliebe - op.48 - Fischer-Dieskau/Demus 1953
Schumann - Dichterliebe - op.48 - Hotter/Altman
Shostakovich - Symphony 5 op.47 - Mravinsky 1954
Shostakovich - Violin Concerto 1 op.77 - Batiashvili/Salonen
Shostakovich - Violin Concerto 1 op.77 - Oistrakh/Mravinsky 1957
Sibelius - Lemminkainen Legends op.22 - Franck
Sibelius - Symphony 2 in D major op.43 - Stokowski
Sibelius - Symphony 2 in D major op.43 - Szell
Sibelius - Symphony 3 in C major - Kajanus
Sibelius - Symphony 3 in C major - Kondrashin
Sibelius - Violin Concerto in D major op.47 - Batiashvili/Oramo
Sibelius - Violin Concerto in D major op.47 - Hahn/Salonen
Sibelius - Violin Concerto in D major op.47 - Perlman/Previn 1979
Sibelius - Symphony 5 in E flat major op.82 - Kajanus
Sibelius - Symphony 5 in E flat major op.82 - Kondrashin
Tchaikovsky - Romeo and Juliet - Kondrashin 1965
Tchaikovsky - Swan Lake op.20 - Rozhdestvensky
Tchaikovsky - Francesca da Rimini op.32 - Rozhdestvensky 1961
Tchaikovsky - Francesca da Rimini op.32 - Rozhdestvensky 1991
Tchaikovsky - Symphony 4 in F minor op.36 - Mravinsky 1960
Tchaikovsky - Symphony 5 in E minor op.64 - Mravinsky 1960
Tchaikovsky - Nutcracker Excerpts op.71 - Mravinsky
Tchaikovsky - Symphony 6 in E minor op.74 - Furtwangler
Tchaikovsky - Symphony 6 in E minor op.74 - Mravinsky 1960
Tchaikovsky - Symphony 6 in E minor op.74 - Rozhdestvensky 1987
Tchaikovsky - Symphony 6 in E minor op.74 - Toscanini 1942
Verdi - La Traviata - Carlos Kleiber/Cotrubas/Domingo
Wagner - Lohengrin, 'In fernem Land' - Tietjen/Volker 1936
Wagner - Die Walkure - Furtwangler 1954 (Pristine Classical transcription)
Wagner - Der Ring des Nibelungen - Krauss 1953
Wagner - Gotterdammerung - Keilberth 1955 (Bayreuth, 2nd cycle of Der Ring des Nibelungen)