I have the C7s since last May and went through the same thing you are.
Not quite a year later and NO BODY is taking these things from me. They are speakers for life and amaze me on a daily basis. Give them some time, the bass does get much better and appreciate what they offer in the mean time- an impressively natural and realistic sound.
You can read about my trials and complaints here-
http://forums.stevehoffman.tv/threads/new-harbeth-c7es-3-some-questions.536298/
Not quite a year later and NO BODY is taking these things from me. They are speakers for life and amaze me on a daily basis. Give them some time, the bass does get much better and appreciate what they offer in the mean time- an impressively natural and realistic sound.
You can read about my trials and complaints here-
http://forums.stevehoffman.tv/threads/new-harbeth-c7es-3-some-questions.536298/