Here is what Neil Snape had to say:
I'd say the Z is much more accurate, the grayscale absolutely perfect, very sharp. Yet in the end even after the last few years of testing and working with the pigment printers, the HP 130 makes the richest prints by such a long way that I wonder if ever pigments will reach THAT type of black !http://forums.dpreview.com/forums/readflat...72&changemode=1
Thanks for the info Daniel.
This confirms my research and decision to more closely evaluate the market for fine art prints in my area before investing in the Z3100.