Well, you can pretty much import your .obj files into Poser or save them out as a .cr2 to use in Poser. The prop set will probably be the worst of it and then the textures. Not sure on your textures though. For example, Iray PBRs are handled a little differently in Poser, but you could probably talk to @phdubrov about how to go about converting them. He's knows quite a bit about handling shaders for both Daz and Poser. For the size thing Lyne is talking about Daz has the option of selecting what size scale you want to use which does include Poser scale when importing .obj files.