Let him know that the longer he waits before decided to take that stuff back, the more "hurt" his wife and family would be. Perhaps you could offer to help him set it up with his family present. You could conveniently have on hand a couple of your speakers that you were taking to a friends house to demo (or something), then A/B them for him and his family. If then still think the HTiB is OK; then they get what they deserve. If THEY decide that they should have gotten better speakers, then there won't be any hurt feelings.
Jeese, kinda manipulative for my first post.
