If =all= you ever intend to do is stills with no venturing into animation whatsoever, then you can make a good case for P4, with Hogwarden's P-Booost to make up for the lack of runtime linking. But. If you have =any= urge to make motion, then there's only one choice; P5. There -is- a hellacious learning curve to it....but with the 'room' workspace layout, you can easily stay on in the pose room and materials room until you are comfortable with them. Don't let the shader system in the material room intimidate you; no one else has really mastered it yet, either, although a few are getting close. The dynamic cloth room can be very useful in stills (you have to set up an animation to get the drape and motion, but all you do is render whichever frame looks best to your eye and wa la), but really shines in animation. The hair room can also produce some nice effects, but there are still issues and people are still working on the tricks to exploit them (the battle cry of Poser: "Damn that bug! But if I do -this-, I've created a feature!!") Faster processors and more ram are always good....but how well behaved Poser is depends on what you are trying to push through it. One of Steffy ZZ's 4000x4000 skin textures can and will gobble up ram (as would anyone else's hi res texture); with the right lighting attempt, you can bring any system to its knees in agony. Same with super dense meshes.