Robert,
I suspect the final ruling would depend on Paul Stevens. We have several justices who play fast and loose with the US Constitution, Roberts has proven to be nearly as incapable of true conservative judgment as we had feared.
Still, living in Europe, I have learned the value of separating the two. Let us have the civil rights we deserve as free humans, marriage by those who are not bigoted haters and let the christianists continue to rub blue mud into their bigoted belly buttons. Eventually, even the Catholic church had to accept that the earth orbits the sun and not vice-versa...