They really do need a true M4... the V4 male has terrible pectoral muscles.  On top of that, there doesn't seem to be a way to bulk up M4 to even close to how you can bulk up D3.  My shirtless barbarian warriors will be D3 until DAZ gets it right.

The ABSOLUTE best reason that upgrade is worth doing, is for the morph remove pose files.  Now my V4's are no longer 150 megs each and I won't have to keep buying external hard drives for my poser scenes.