Lovely and awesome model! I think I can't say anything that hasn't already been said.

As an add though, I'm not sure how adept you are at rigging, but this may be worth a look. It is a much more detailed rigging setup but the results are spectacular.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2752937

And though I am a big fan of "low poly" modeling, being a modeler myself, it has it's drawbacks as well as benefits. With today's systems it's fairly subjective in terms of weights and balances. As you had mentioned, if subdivision was a possibility within Poser, itself, there would be little issue and the drawbacks of "low poly" models would be a moot point. The major drawback being detailed, 3rd party, morphing of the existing geometry without subdivision. Sure, displacements could be used to simulate some details, but comes with it's own inherent set of limitations and at rendertime it's still as much of a resource hog as is a higher poly model. Regardless, I think the majority of modelers make it a goal to stay at or under a certain poly-count as a rule and I think it is a good thing, but as systems become more powerful it is only natural to raise the bar a bit and alleviate some of your own headaches, as a modeler, to say "okay, maybe a few more thousand polys isn't going to hurt". I for one, am anal about poly count and have some architectural models that I have never released simply because I couldn't get the suckers under 100,000 polys without causing issues or losing detail that I found necessary (but architectural models are another monster altogether hehe). I finally released one recently after it sat on disc for a couple years and I have had no complaints as of yet (Helloween House.... approx 115,000 polys). And it is merely a static prop with no interior designs. Ughh... LOL. However I have done some research and found automotive models and others (very fine models to boot) that average on 200,000-400,000 polys! So, I would say a figure between 30,000 and 100,000, by today's standards may still be acceptable as "low poly".
Just my thoughts ;o)

~Will