Here are some recordings done by Fr. Aaron Warwick, a priest in the AANA in Wichita, Kansas. He is also my godfather and taught me a lot about chanting.
All of these are recordings of Kazan's music, with the exceptions of stichera which I think he "free chants", but I'm not sure.
http://www.stmarywichita.org/vespershymns.html You can go on the sidebar and hear Kazan hymns for Orthros and Liturgy, too.
As for the criticism that Kazan is not authentically Byzantine chant, there is merit to it. Someone already stated that Kazan tried to fit Greek and Arabic melodies into the English from the 5 lb. Nassr book. THe problems are myriad and I give props to Dr. Kazan for doing something which had not been attempted yet, but there are some glaring defects that classically trained chanters, especially from the old countries, would balk at. Plus, the Greek/Arabic melodies were composed for languages with a different accentuation, syntax and morphology from English which only compounds the problem. However, with the resources that are now available from places like St. Anthony's, there are now different options. My priest wants to stick with Kazan for the main parts of Vespers and Orthros (Psalm 140, Evlogetaria, Ainoi, Resurrectional Apolytikia and Theotokia etc.) so the people can "participate" but for other sections, we chanters are free to use material from other sources as we deem fit.
On St. Anthony's website, they offer critiques of Kazan and other adaptations of Byzantine melodies into English. It's a good read. http://www.stanthonysmonastery.org/music/Adaptation.htm