Welcome and as ken said, a good start.
@ken: Kepf may has his own plans when importing to poser.
Even better kepf, you could export the obj from poser to blender and render there (much more options), you may want to convert obj to 3ds (blender) and export to SU free. I like imports-exports, I'm good on this LOL
But the real problem is the exports from SU (especially the free version). The pro version has a decent obj exporter OK. Try to find and use the SU6. It exports to google earth (google earth 4) format. Rename it to .zip, unzip it and you find a decent collada file at last. Use this. Don't expect much from textures though, the reversed (bluish) faces are a problem.