There are many great recordings available, and below is a sampling of where to get started:

Standard Repertoire:
Notable Artists:
Dale Clevenger (Super duper famous.  I've met him. :)
William VerMuellen (Super duper famous.  I met him this summer finally. :)
Arkady Shilkloper (Jazz Horn.  Also super duper famous.  Finally met him this summer, too!)
Sarah Willis (Berlin Philharmonic, Horn Hangouts)
Laura Brenes (close friend/former BYU student)
Laurence Lowe (BYU Horn Professor)
Steve Park (Orchestra at Temple Square principal horn)