Horizons seems to be Ira Sullivan's only album as leader between 1962 and 1975 - recorded in Miami after he moved there (March 2, 1967). It's by a quintet, with Sullivan playing trumpet, tenor, and soprano. The others are mostly Miami guys, and their playing is impressive: Lon Norman on trombone and baritone horn, Dolphe Castellano on piano and electric harpsichord, Bill Fry on bass, and Jose Cigno (whose playing I like very much) on drums. The program is a mix of bebop, standards, modal stuff, and "Norwegian Wood" with soprano and harpsichord. It was reissued on LP on Discovery at some point, and it looks like it came out on CD in one of the strange Collectibles pairings with a Luis Gasca album. Anyway, I like it - it shows how adventurous and wide-ranging Sullivan was.
Curious. I have the Delmarks and used to have a beater copy of Bird Lives; still enjoy the Delmarks quite a bit.