I wouldn't quickly spend money on Stephanie 3 or Victoria 4 models just yet unless they are integral to your needs.  Occasionally, DAZ3D will rotate content biweekly through their freebie section and, if you are lucky, might be able to download V4 for free.  I haven't seen that many Generation 3 models (V3, Stephanie 3, M3, etc.) appear in the freebie section, there isn't much demand for them anymore.