Hi Pixologic, I would like to tell you that, in my opinion, ZBrush is the best when it come to sculpting.
However, it`s also the worst when it come to Retopology and UV Unwrapping.
Retop lines are hard to see, sluggish, unintuitive, and create glitches from time to times.
I was wondering if you could make something like Silo, in which we simply [DRAW] the topology?
http://www.nevercenter.com/wiki/index.php?title=Topology_Tool
Or, something that mark out edges and corners, and generate quads from there. Now that there`s the paint polygroup feature, this should be easy.
As for UVUnwrap, I dont know whether GoZ support XSI yet, but I think its still too much of a burden to switch to another package.
I`ll vote for unwrap base on polygroup/ hard edges&corners feature.