I think so many micro-details can be done with textures and displacement, so high poly figures are really just a waste of resources. I've gotten great close-up detail with James lo-res for christ sake. ;-P That said, the problem with lo-poly figures in Poser is morphing. Because Poser is not a modeling app, and most of it's users aren't intersted in that aspect of 3D, the demand for a figure that can morph into almost any kind of character is always high. So... in order to get that morphing flexibility, the poly count on the figure needs to be adequate to assume all the shapes and expressions people want. I definitely think anything over 60k-90k polys is a total waste. If the modeling is done properly, and the mesh is detailed in the right areas, 90k polys is WAY more than you should ever need for a "naked" human model (probably too much), especially with Poser's smoothing capability.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.