Thanks again, everyone.
The recent post was certainly...comprehensive!
I actually finished 2 cds using many of the recommendations you all so kindly posted. Some people tended to favor beautiful singing, so I did one cd focused this way, while another focused on beautiful songs - often sung by less than beautiful voices. The initial response from my father in law to both cds could probably be best characterized as "grudingly positive".
Thanks again,
Marty.