Personally, I get a kind of 3D Claustrophobia in Poser if I try setting up and rendering a scene in Poser5/6 -- is like setting up a scene in a closet. Moving the Poser objects to Carrara5 Pro for assembly/rendering is like setting up a scene in a big room or the outdoors -- a lot of virtual elbow room.

C5Pro has arguably the best render engine available for a 3D application -- certainly when considering its cost.