Digital BW, The Print

I'm thinking about the HP 8850 or 9180 for larger than letter sized
glossy B&W.  I currently use UTR2 in a letter sized R220 and like it
but haven't had much luck getting 3MK to work in a R1800, and it
doesn't do gloss-type papers anyway.

I wondered how the bronzing and gloss differential is on papers like
Epson Premium Semigloss, Silver Rag, or Harman FB Al Baryta?  I'm
looking for print quality on par with the entry-level R220, which has
next to no bronzing and gloss differential is hidden on papers like
the Harman.