I would vote for Poser as well, but be prepared; Poser isn't an easy to use by the numbers piece of software.

You will be able to produce something right away but to get results like the ones in your link will take a lot of work.

But if you want to be a 3D artist then this is a good place to start at a reasonable cost.

The DAZ interface is so different then the one in Poser that it would be difficult to make the transition later.

With Poser you will get years of material from the previous versions to you will have a lot to work with right from the start.

If you shoot a mime, do you need a silencer?