Well, If you have decided to get yourself a 3D program specifically for human form, then Poser might be it. Poser 6 definitely. Poser artist is a bit outdated :) But I suggest you see DAZ studio once, its free, at www.daz3d.com. But if you are not specifically looking for human figure related stuff, I may suggest Truespace. And please also have a look at Wings 3d. Its free and quite good. But if you want Poser, go for Poser 6.