I would write off even thinking about 3ds or lwo format if I were you.

For one thing, the 3ds format is limited to 65,000 polygons, so anything more than that will fail, which would include the Daz people, and I think the latest S-M creations would be pretty close to that limit too. More importantly, perhaps, is that the 3ds format supports only triangles, and most (if not all) Poser figures are mostly quads, which deform better than triangles. Meshes exceeding the limit will be broken apart into groups, and probably not the groups you want.
There are other limitations of the ancient .3ds format too that don't bode well with Poser.

Secondly, in spite of the fact that Poser claims it uses the LWO2 format for lwo import/export (as an option), it is wrong, because whatever bizarro broken version of it they implemented doesn't support UV maps either on import or export. So any models you have that have UV maps - which of course means all Poser figures - will import or export and lose the UV map along the way.

Best bet for Poser is and has always been OBJ. Really, that's about the best for all programs until the day when Collada or FBX become more standardized.