Since once again, we seem to be arguing two different points past each other, let me offer this:
In terms of "what's best for the children", all else being equal, I would suggest (in priority order):
1) Married, opposite sex parents
2) Unmarried, opposite sex parents
3) Married, same sex parents
4) Unmarried, same sex parents
I'd also say that there is a much,much bigger gap between 2 and 3 than between 1/2 or 3/4.