In my opinion, Agnosticism makes the most sense. I think what exists outside the bounds of our physical universe, and before (and after?) 'time', is unknown and unknowable. God, Zues, the Matrix, or a spontaneous generation, it's all the same to me. The Christian story is full of contradictions with the evidences of our origin which surround us, but that certainly doesn't rule out in my mind the existence of some sort of creator. I sincerely doubt it gives a shit who I am or am not having sex with in any more than an ant farm sort of way. Obviously, we are, rather than are not, but God only moves that question to "where did God come from?".