pretty much any app that can export .obj files will work with poser just fine. its better if the app can do exportable uv mapping and grouping right in the app. But ultimately you have to factor in the Grok factor, the best modeler in the world doesn't help you if you are not comfortable using it. DAZ has used several apps over the years. Lightwave was popular for a while, and more recently Modo. but they don't use any one app exclusively. I tried lightwave at one point due to the fact that several people recommended it highly, but it never flowed for me. C4D works for me, I seemed to understand it almost intuitively but I have heard other people say that they couldnt stand the workflow and prefer something else. it is possible now that DAZ and E-fronteers both own a couple of modeling apps that one of those apps might come to the forefront for product development due to the fact that both companies are so familiar with the workflow of poser, but we will have to wait and see.