Excellent start, Bill. I have that disk too, not only is the Haydn very good, but that c minor sextet is a great intro to Krommer for those few who are unfamiliar with him!
I'm am not just overrun with Haydn divertimentos, although I have a few. The difficulty in recommending is that many of them are OOP.
One that is OOP, but still frequently available in Amazon Marketplace or eBay is on SONY, called "Haydn 'The Natural Horn'". It features L'Archibudelli with Ab Koster on horn, and the contents are:
Hob deest (means "not appearing in Hoboken", BTW) - Cassation in D for 4 Horns, Violin, Viola & Bass
Hob II:21 - Divertimento in Eb for 2 Horns and String Quartet (a very popular combination in those days)
Hob VIId:3 Concerto in D for Horn, 2 Oboes & Strings
Hob IV:5 Divertimento à tre in Eb for Horn, Violin & Cello (yup, that's a Horn Trio)
Hob II:22 Divertimento in D for 2 Horns & String Quartet
This is a super disk for lovers of the natural horn and Haydn in general.