The Concertgebouw in Amsterdam has a nice series of concert each season with about 12 pianists (can vary a little). Here's the program for next season:
Jonathan Biss - 24 September 2006 — 20:15 Beethoven - Sonata nr. 27 in e, op. 90
Schönberg - Sechs Kleine Klavierstücke, op. 19
W.A. Mozart - Sonata in F, KV 533 / 494
Schumann - Davidsbündlertänze, op. 6
Murray Perahia - 29 October 2006 — 20:15 Works by W.A. Mozart, J.S. Bach and Chopin
Lang Lang - 12 November 2006 — 20:15 W.A. Mozart - Sonata in C, KV 330
Chopin - Sonata nr. 3 in b, op. 58
Schumann - Kinderszenen, op. 15
Rachmaninov - Prelude in Bb minor, op. 23 no. 2
Prelude in g, op. 23 no. 5
Liszt - Sonetto 104 del Petrarca
Liszt/Horowitz - Hungarian rapsody no. 2 c#
Nikolai Lugansky - 26 November 2006 — 20:15 Franck - Prélude, Choral et Fugue, op. 21
Ravel - Gaspard de la Nuit
Rachmaninov - Moments musicaux, op. 16
Sonate no. 2 in Bb minor, op. 36
Maurizio Pollini recital 1 - 4 February 2007 — 20:15 Works by Chopin
Maurizio Pollini recital 2 - 17 February 2007 — 20:15 Classical/Contemporary Program
Radu Lupu - 11 March 2007 — 20:15 Schubert - Sonata in A, D 664
Debussy - Preludes, book II (selection)
Brahms - Four Ballades, op. 10
Beethoven - Sonata no. 18 in Eb, op. 31 no. 3
Severin von Eckhardstein - 22 April 2007 — 20:15 Works including:
Prokofiev - Sonate nr. 6 in A, op. 82
Mendelssohn - Lieder Ohne Worte (selection)
Liszt - Sonate in b
Grigory Sokolov - 6 May 2007 — 20:15Works by L. v. Beethoven and J.S. Bach
Martha Argerich and Nelson Freire - 20 May 2007 — 20:15 Works for 2 pianos:
Rachmaninov, Ravel, Schubert (will be announced later)
Maria João Pires 3 June 2007 — 20:15 Works by W.A. Mozart and F. Schubert
Evgeny Kissin - 10 June 2007 — 20:15 Schubert - Sonata in Eb, D 568
Beethoven - 32 Variations on an own theme in c, WoO 80
Brahms - 6 Klavierstücke, op. 118
Chopin - Andante spianato et Grande Polonaise brillante, op. 22
Alfred Brendel - 17 June 2007 — 20:15 Haydn - Sonata in c, Hob.XVI:20
Beethoven - Sonata no. 31 in Ab, op. 110
Schubert - Impromptu in f kl.t., D 935 no. 1, Impromptu in Bb, D 935 no. 3
W.A. Mozart - Sonata in c, KV 457
I hope I didn't make any mistakes translating

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Just wanted to share. And which recital would you go to if you were me (please not too expensive, like 65 euros for Martha Argerich etc.)?
