Actualist utilitarianism

I'm quite interested in utilitarianism, as to my mind it ranks as one of the most plausible moral theories.  There's an interesting discussion here  of some technical issues surrounding being an actualist utilitarian, which is to say a utilitarian who only takes into account the interests of actual people, vs. any version of utilitarianism which would take into account the interests of potential people.  I'm inclined to think the actualist option is the only option that is tenable, so it's fortunate that the technical issues seem to be mostly resolved.