Yes, it's a good start to stay with the program you know. There might be things which other programs can do better, and something small and simple might be useful for making small changes. UVmapper, for instance. Once you have the mesh you can do a surprising amount to sort out groups and materials with that, and in some ways it can be better than the in-Poser grouping tool. It can also sort out some problems with the .obj file; the version it saves seems to be more compatible with Poser.