Quote - And that brings up another question:

If I stay with Poser and M5 is coming out soon, should I bother to buy M4 Morphs++? (or for that matter V4 Morphs++?)

If you're still using Gen4 and making stuff with that, sure it makes sense to get the morphs++; however at this point if you want to use M5, currently DS4 is your best choice. As I mentioned before, if you are rending women, then you have more choices. But remember the scaling options you got with steph4 and there was no David 4? What about teens? What about clothes for them? For those that do those types of renders, then genesis is probably what you are looking for, because these not any solutions coming anywhere else.