Digital BW, The Print

Paul, I am about to load a regular set of VM inks with the Eboni Black
into my new CIS tomorrow.  What is the 
difference between the 5 gray MIS VM inks and the 5 gray Ultratone inks?
 What are the advantages of the ultratones?  I understand the Ultratones
are more archival, but give about the same quality prints? There are
just too many inks out there now. THe piezotone selenium inkset and the
black black sure do look nice... Wonder how they'd look with the Eboni
black replacing the "black black"?

Too bad they are so overpriced...

jerry