If Vue is an issue, I'd definitely stick with Pro Pack. Although it doesn't have the Firefly Rendering Engine P5 has (which is much better by the way) Vue renders Poser figures very well, plus you have more lighting options. Lighting is one thing that didn't change from PP or P4, unless you count the atmospheres (which not many people know how to utilize yet because there is a startling lack of documentation. The Firefly Renderer is the only thing that I've found exceptional about P5. PPP is easier to use and if you don't care about growing hair, dynamic cloth, or the face room you probably would be just as happy.