Mari, Substance Design, 3ds max, Maya, Cinma4D etc all provide a far better and more versatile 'material room'. And the result when baked surpass anything you can hope for in Poser. In addition you don't impose a straight jacket on the user -he is free to play in Poser's material room, he has a clean slate so to speak.

That is only sound logic and common sense. But why not check some top vendors on a random basis and you will find that they all provide material that look great with only a bump map and Posers standard lightening.

 In addition, you can export to another program and still hope for a good reult.