If you import the model into Blender using .obj format they will lose all rigging (posing ability).  Furthermore they won't have any of their morphs.  The collada format is an attempt at creating a universal import/export function that can maintain rigging, morphing, et al between 3D apps.  But Poser rigging is so different from any other used that it doesn't convert well.   DAZ sells Carrara (spelling?) that is supposed to be able use Poser content, but from what other have said in several forums, it doesn't seem to work at the moment.   Your best options are either learn Puppeteer as already been suggested, or consider getting Poser.