Here are a variety of examples of well recorded sounds from my CD collection. I also like the performances, but the focus of this list is primarily on sound.
Playback should be at realistic volume levels, neither too high nor too low, to fully experience the presentation.
(The most recent additions are at the top of the list)

Sjostakovitj, Symfoni Nr 15, Uppsala Kammarorkester, Magi, SCD 1148 (Great recording to show off the ORION's qualities)
Beethoven, Complete Sonatas & Variations for Cello and Piano, Channel Classics, CCS SA 22605, 2CD
The Ray Brown Trio Live at the LOA, Summer Wind, Concord Jazz SACD-1027-6
Postcards, Turtle Creek Chorale, Reference Recordings RR-61CD
Ein Straussfest, Cincinnati Pops Orchestra, Kunzel, Telarc CD-80098 (listen once demo stuff)
Haydn, String Quartets, The Amsterdam String Quartet, Channel Classics, CCS SA 25907
www.brklassik.de - Bavarian Radio classical station on the web with an interesting mix of old and new music. I listen to the station with my Logitech Squeezebox connected to the ORION system. The sound stream is at 128 kbps CBR and usually of very good quality. Often the material is from recent live concerts in Europe, well recorded, but not available on CD.
Jennifer Warnes, Famous Blue Raincoat, The Songs of Leonhard Cohen, BMG 01005-82092-2
Randall Thompson, The Testament of Freedom, Timothy Seelig, Turtle Creek Chorale, Dallas Wind Symphony, Ref. Recordings RR-49CD
Rachmaninoff, Vespers, Robert Shaw Festival Singers, Telarc CD-80172
Handel, As steals the morn ..., Arias & scenes for tenor, Mark Padmore, The English Concert, Harmonia Mundi HMU 907422
Beethoven, Complete Sonatas and Variations for piano and cello, Pieter Wispelwey & Dejan Lazic, Channel Classics CCS SA 22605, 2SACD
Leif Ove Andsnes, A Portrait, (piano - Grieg, Liszt, Haydn, Nielsen, Tveitt, Johansen, Saeverud, Janacek, Rachmaninov, Shostakovich) EMI Classics 5 74789 2 (2 CD)
Thomas Quasthoff, Bach Cantatas, (bass-baritone) DGG B00003458-02
Janine Jansen, Vivaldi, The Four Seasons, Decca B0005298-02
Jacintha, Here's to Ben, A Vocal Tribute to Ben Webster, Groove Note, BRV1001-2, #4, 9
Joe Cocker, Ultimate Collection, Hip-O/A&M B0001572-02 (a study in recording technique and sound processing over a 32 year span)
Herbie Hancock, Gershwin's World, Verve 314 557 797-2, #2, 3
Mahler, Symphony #3, Riccardo Chailly, Concertgebouw, Decca B0002336-02
Stravinski, The Rite of Spring, Lorin Maazel, Cleveland, Telarc CD-80054 (powerful bass, fierce brass, spectacular)
Diana Krall, The Girl in the Other Room, Verve B0001826-12, #3, 10
Mahler, Symphony #2, San Francisco Symphony, MTT, SACD 821936-0006-2
Arthur Rubinstein, The Chopin Ballades & Scherzos, Living Stereo, SACD 82876-61396-2
Orff, Carmina Burana, Telarc SACD-60575
Sound Pictures, a sampling of my own special recordings on a Demo CD
Super Bass 2 with Brown / Clayton / McBride, Telarc SACD-63483, #7, 11, 12
Medeski, Martin & Wood, TONIC, Blue Note Records, #8, 6
Mickey Hart, Planet Drum, Rykodisk RCD 10206, #7
Three Guitars, Larry Coryell / Badi Assad / John Abercrombie, Chesky JD248, #5
Lhasa, La Llorona, Atlantic 83120-2, #8, 5
Stravinsky, Shadow Dances, DGG 289 453 458-2, #1, 21, 24
Brian Bromberg, WOOD, A440 music group, 4001, #1, 3
Wynton Marsalis, Mr. Jelly Lord, Standard Time, Vol. 6, #2, 5
Rachmaninoff, Symphonic Dances, Eiji Oue, Ref. Recordings RR-96CD
Ports of Call, Eiji Oue, Ref. Recordings, RR-80CD, #2, 1, 9
Benjamin Britten, The young person's guide to the orchestra, RCA 09026-61226-2, #10, 2, 1
Horowitz at Home, DGG 427-772-2, #7
Yo-Yo Ma, The New York Album, Sony SK 57 961, #1, 2
Ofra Harnoy, Romantic cello sonatas, RCA 09026-61818-2, #3
Igor Stravinsky, Histoire du soldat, Chesky CD122, #12
PULSE, The New Music Consort, Classic Records NWCD 319, #1, 3
Ariel Ramirez, Misa Criolla, Philips 420 955-2, #1, 5
John Rutter, Requiem, Ref. Rec. RR-57CD, #9
Mi Buenos Aires querido, Daniel Barenboim, Teldec 0630-13474-2
Belafonte at Carnegie Hall, Classic CD LSOCD 6006, 2#9, 5, 4, 7, 6
Fairfield Four, Standing in the safety zone, Warner Bros. 9 26945-2, #9, 3, 7
The Roches, Warner Bros. 3298-2, #5
Rickie Lee Jones, Pop Pop, Geffen GEFD-24426, #7, 6, 9
Holly Cole, Temptation, Metro Blue CDP 7243 8 31653 22, #4, 3, 11 (bass is exaggerated)
Jazz at the pawnshop, Proprius PRCD 7778, #3, 5
Duke Ellington, Indigos, Columbia CK 44444, #8
Bela Fleck, Live Art, Warner Bros. 9 46247-2, 1#4, 7, 2#1, 6*, 9
* = Test your system to hear if it can play track 6 on disc 2 cleanly at realistic volume levels. Be careful!
I - Ching, Of the marsh and the moon, Chesky WO144, #1, 6, 7, 10
Andreas Vollenweider, Book of Roses, Columbia CK 48601
Pink Floyd, The Wall, Columbia C2K 68519, 1#4, 5
Stevie Ray Vaughan, The sky is crying, Epic EK 47390, #2, 8, 4
The best of Santana, Columbia CK 65561, #3
Eagles, Hell Freezes Over, Geffen GEFD-24725, #6
Bucky Pizzarelli, Swing Live, Chesky JD 218, #7, wow! play it live!
Edgar Meyer, Bela Fleck, Mike Marshall, Uncommon Ritual, Sony SK 62891, #7, 8, 17
Deedee Bridgewater, Live at Yoshi's, Verve 314 543 354-2, #5, 9
MANGER, Musik wie von einem anderen Stern, sampler (Caution: #12 has severe subsonic signals)

More to come, as I think of other recordings, or hear something special. This is not meant to be an exhaustive list, just a sampling of the sonic treasures out there. Let me know, if you have a favorite that I should listen to.

A good reference source for audiophile recordings is the catalog from musicdirect.

Marc Heijligers has a music collection where I see a number of recordings that I have heard and I would assume that other ones are of similar quality.

What you hear is not the air pressure variation in itself
but what has drawn your attention
in the two streams of superimposed air pressure variations at your eardrums