I'm tempted to choose B just because if I choose A someone will try to use the Axiom of Transitivity to "prove" that I value some very large amount of paperclippers more than some small amount of humans. And I don't.
I might also choose B because the paperclipper might destroy various beautiful nonliving parts of the universe. I'm not sure if I really value beautiful rock formations and such, even if there is no one to view them. I tend to agree that something requires both an objective and subjective component to be truly valuable.
On the other hand, maybe the value for beautiful things I will never see is some sort of "between the margins" value, something that I value, but that my values regarding eudaemonic life are lexically prior to. All other things being equal, I'd prefer a universe with even a tiny amount of eudaemonic life (that isn't suffering or anything like that) to a totally lifeless universe chock-full of unobserved beautiful stuff. But maybe a lifeless pretty universe is more valuable to me than a lifeless ugly universe, all other things being equal.
Thought experiment:
Through whatever accident of history underlies these philosophical dilemmas, you are faced with a choice between two, and only two, mutually exclusive options:
* Choose A, and all life and sapience in the solar system (and presumably the universe), save for a sapient paperclipping AI, dies.
* Choose B, and all life and sapience in the solar system, including the paperclipping AI, dies.
Phrased another way: does the existence of any intelligence at all, even a paperclipper, have even the smallest amount of utility above no intelligence at all?
If anyone responds positively, subsequent questions would be which would be preferred, a paperclipper or a single bacteria; a paperclipper or a self-sustaining population of trilobites and their supporting ecology; a paperclipper or a self-sustaining population of australopithecines; and so forth, until the equivalent value is determined.