I have Poser 5, I started with pro pack....the render engines are crappy in both apps..don't own p6 but I expect it is just as bad. I render everything in Vue5 now..best render engine I've used so far.....but if I had to pick I would pick P5.I wouldn't purchase P6 as all the posts I've read here are full of nugs with P6 IMHO I would buy P5 at least you get all the service releases with it and it's practically bug free, as with P6 it's probably going to take them another yera to fix all the bugs it has, just like they did with P5. You would think that Curious Labs or E Frontier would have thought about this before releasing P6 but as usual they just slap it all together and sell,sell,sell and use the faithful consumers as beta testers. So I personally would keep away from P6 untill it has been fixed up. I know I won't be getting P6 untill I know it's pretty much stable.