I have C5pro, works well right now with Poser, yes it imports the figure so you can pose inside Carrara, you also imports  the figures morphs so you can change them too. It also imports the dynamic cloth and hair. Great lighting and rendering. Wind force and particles and so on.

I'm buying Vue6I through a Vue4 upgrade to Vue5I. I like the idea of P6 materials and better in app posing. Vue seems to do water better. New lights , ecosystem, new windforce type tools and  new Animation system.  I have 2 parts to the Vue package. Shade, which Vue imports/exports shade files and Poser6. The three parts should make a nice whole package.

I have and use Shade 8.52. It's curve modeling is it's stongpoint. It's a spline modeler compared to block modeling so the learning curve is quite different. I use it with Hex and wings, each has something that is easier to do than the other. It has a much better render than poser. HDRI, AO lighting. Imports poser files.