I've almost completely stopped buying any products for P4 or Pro Pack.  It's now two versions old and I don't prefer how they render in P6.  I understand there are still many P4 users about, but the variety of options in the material room for customizing textures, etc., IMO, is much more conducive to the types of effects I'm after.

I dare you, while there is still time, to have a magnificent obsession. --William Danforth