Ronno and Foghorn, thanks so much for taking the time to share your thoughts and experiences. My "inner cheapskate" is alive and well, and all options remain on the table. Foghorn, I think your observation about letting the "main room" sub supplement the (nearly adjacent) zone 2 speakers is spot-on. Best solution for me continues to look like finding an affordable used power amp or integrated amp to run the extra zones from the zone 2 pre-out of my humble Denon.

bibere usque ad hilaritatem