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

Standard Repertoire:

Mozart 4 Horn Concertos

Beethoven Horn Sonata

Strauss Horn Concertos

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)