Here is my 2 cents on C6pro.

*It has an extremely fast rendering (unless you add physics, then all bets are off).
*Its handling of poser content within the program (meaning the ability to re-pose) is very good
*hair is good, but since it can't export of limited use to me
*very fast viewport performance with the improved openGL
*animaiton tools are very easy to use and pretty fast, I can imagine the Non-Linear animations being extremely useful
*still pretty buggy to me, thought its speed well makes up
*gobbles up RAM like crazy when using big texture maps (one aiko, with med resolution texure maps, smaller resolution maps for a single dress, and aiko ponytail and maps - came very near to the 2 GB of ram used)
*ocean primative doesn't seem realistic looking to me (though this may still be my lack of experience with it).  A poster at Daz has explained that it is primarily for animations, and I have to agree for stills you can get a better look without the ocean primative.
*importing of pz3s is hit or miss at the moment
*95% of straight runtime importing through the content browser has worked fine for me, though others seem to be having more problems with it.
*no 64bit version, though it works in XP pro 64 (at least so far)

I model in Lightwave, so I didn't look at any of the modeling features.

Bottom line for me is that it is an extremely fast program with a few quirks to still work out.  It is probably well worth the current cost (actually its probably a steal at the current cost).  Though, it is not a Vue replacement (as some users at Daz have argued).  Ecosystems are still far superier IMHO. Environment creation in general is still much better in Vue, again IMHO.  Also, though slower, I believe the Vue render engine is more photorealistic as well. 

"If you are neutral in situations of injustice, you have chosen the side of the oppressor." -Desmond Tutu