Dave,
I'll admit I have not read EVERY post on this topic, but have you ever checked out Unity (not to be confused with Unitarian)? I know you were talking about starting something new, but in case you decide not to, it seems it might fit a lot of what you are in alignment with (based on what posts I did read, that is). Also, Religious Science (not to be confused with Scientology): although not a "Christian" denomination per se, but draws from all religions and supports thinking for yourself. Neither have creeds.
As a traveling musician who "ministers" through music I support your music centered idea of service. I've pondered this, too, and so have others I know, so you're not alone in that! Great minds think alike!
I also think we are called to begin doing church differently; less “top down”.
Namaste,
Vocalist of the Heart