It's true that C4D is an incredible renderer (provided you have all the bells and whistles of the Advanced Render module, of course), but to use it purely for that is missing the trick somewhat. If all you're looking for is another piece of software to render out your work at the end of creating it in Poser, there are other, better options.

For still images, you could do worse than Blender. By importing your Posers scenes in as obj's, and with a little tweaking on the materials (I don't know how much, to be honest - someone else help out here?), you get a lot of possibilities opened to you with their renderer. Best of all is the price: since it's open source, it's free.

For animations, you might be better off looking at something like vue or carrara. Both impot .pz3 files in their native format, so any rigging and animation of the characters also follows through. They also are much, MUCH cheaper than C4D (well, Vue infinte is more expensive than c4d asic, but that's not a fair comparison).

So those are the two options I'd look at before splashing out all your money on C4D. It's a great program (I use 9), but if you're not going to use the modeling aspect of it, then it's a bit of a waste of readies, in my opinion.

Hope this helps,

jonthecelt