Sinnersaint, let's see some of your models and renders.  You talk some high power stuff, but your gallery is empty. Talk is cheap.  Show some of the work you and your studio has produced.  On the other hand, I know Luxxeon knows what he's talking about. I've used his models, seen his renders, watched his tutorials, and modelled against him in challenges on various forums, including here.  Topology matters.  Try subdividing a model with lots of ngons and tris.  Try deforming a character without properly defined edge loops.  Try editing a model with illogical poly distribution.  If you aren't bald already, you soon will be.

Back on topic:  I too see some polygons in that model which could cause issues in not only Poser, but some other software too.  That huge ngon at the back of the stock might be one of them.  I highly recommend quading that up, or at least triangulate it.  I know it's a flat surface, but ngons are almost never a good idea, especially if you plan to sell or redistribute the model.  Good work though.

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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.