I don't think V5 is worth using in Poser.  DSON clothing export has not worked well for me, and I don't like the new Genesis clothing at all.

If you're going to use DS4, then V5, S5, and A5 may be worth it, since you can convert V3 and V4 clothing quite well.   Plus they have V3 and V4 shape morphs for Genesis.  Shoes don't convert well, and Genesis shoe selection is very limited.