Only thing I has against Poser is that you are limited to a certain number of models, those being mostly humans and some animals, dogs, cats ect. If you want to do special beasty things, like those fell beasts in LOTR for example, you haveto buy them and that's probably not cheap. In other words, you can't make the models
exactly the way you'd like, like you can in a modeling-package.
But as said before; Poser might be a good way to get started if you not familiar with CG.
2,4 Ghz, 1 Gig, gForce FX 5200 - and then some...