"best" is subjective, as others have mentioned.

if what you're asking is, "is there an easier way to do still images from 3d?"  yes.  i'd say that daz|studio (d|s) is much less powerful than poser, and therefore much easier for the basics.  but it matters what you want to make.

want the perfect skin shader?  well, poser and even d|s will make that harder than the big boys.  the fact of the matter is you need 3 layers of subsurface scattering to do it right, and that's just not easy in d|s (with the pwSurface plugin) and pretty near impossible in poser. 

want to render landscapes or people in natural settings?  look at vue.    it will be much easier to use an environment building program (like vue, carrara, bryce or terragen) than a general 3d (3ds max, blender, maya, cinema 4d) or posing program (poser, d|s).

want to render lots of people?  then poser isn't going to be happy, and i'm not sure d|s is either.  i've not seen any d|s renders with 10+ humans in them. 

even though more powerful apps are more complex, they can make achieving certain effects much, much easier by supporting certain features.  just about any program will let you get close up on a figure's face.  it's the content created by everyone from eFrontier and DAZ to individual merchants to freebie creators that provide detail and flexibility.  and most of that you could pose in poser and then transfer to another application for rendering if you wanted.  poser won't give higher detail or better results than say cinema4d or maya.  but poser is a heck of a lot easier and cheaper.