I don't know how anyone can be happy with the restarting of the render cows.  The render cows in vue have had serious problems for years, but they have come some way.  By this time, I am use to the restarting of the cows.  I can usually get away with 3 renders before restarting all of the cows.

I never tried C5pro.

For viewing pleasure, I like vue more, but C5pro looks very good too.

As a long time vue user I am not about to jump ship. I am more than excited to see what Vue 6 has to offer.  When will we know?

I hope they offer matte shadows and a better toon shader.