Apollo Max and V3.  Apollo is simply the best male Poser figure available at any price, and it's free. While V4 has superior joint rigging, I don't care for her body shape, morphs and problems with her textures. Trying to get a render that doesn't look like a plactic anime doll requires almost more effort than its worth.
I think V3 still holds the queen's crown, at least for now. I'm sure that situation will change as more content develops, but at the present rate, that could be a while. Until then, I'd nab V3 and all the tons of free stuff available. The addition of PhilC's wardrobe wizard would give you almost limitess additonal options for figre creation.
Now if Anton would only create a female companion for Apollo, we'd all be happy. I'd purchase that in a heartbeat, and I'm about as cheap as humans can get. I'm even considering having the phrase "Never Buy Retail" tattoed across my forehead, but I can't find a tatto parlor that accepts food stamps.