i got the opportunity to try new dynamesh feature on zbrush 4r2 beta,
you don't need to think about topology , it's just about your concept.
you can fully use tools like hook, pinch, inflat, clip, also new curve tools, boolean and more...
and in one click you have clean distributed mesh resolution .
Thanks to pixologic, for this awesome feature.
image render in zbrush with bpr filter :