Here's a few. Except where noted, these are solo organ recordings:
Michael Murray is a good place to start, e.g. "Organ Blaster" on Telarc, which is an introductory sampler of solos and orchestral pieces. His other recordings tend to be over-processed but reliable. He also appears on hybrid SACD if that's an option for you, "Dupre, Franck, Widor at St. Sulpice" (Telarc SACD-60516) is excellent.
My best Widor No. 5 is David Hill at Westminster, Hyperion records.
A favorite organ vs. orchestra piece is Simon Preston and the London Symphony Orchestra playing Francis Poulenc, the second half of a 2-CD set, "Messiaen: Turanglia Symphony etc." on EMI Classics.
For a more raw, sparkling baroque sound, "Orgelwerke Norddeutscher Meister" by Robert Kobler on Edel / Berlin Classics is highly recommended.
Many others on high-resolution surround. The best I've heard is "In Spiritum: Olivier Latry plays Cesar Franck" on Deutsche Grammophon. This is also a CD / SACD hybrid.
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