Digital BW, The Print

I am in the process of upgrading from the Epson 2100 to the 2400. I 
am aware that both printers use the same matte black ink which 
worries me a little. I mostly printed using Lyson's quad black inkset 
on the 2100 and the blacks were deep and satisfying though there were 
other problems.
I was less satisfied with the blacks I achieved using the supplied 
Epson ultrachrome inks on Epson matte media. The prints had 
a "newspaper like" quality as a result of an insufficient tonal range 
despite a full range of tones in Photoshop ( "0" to about "240"). 
These images look fine under glass but were inferior to darkroom 
prints in the hand. I suspect the paper I used may not have been the 
best -- Epson "watercolor" and "Heavyweight matte". I was also using 
the standard Epson printer driver.
Can I expect better blacks using different matte papers? Would using 
Ray Harrington's QTR have any bearing? Am I right in thinking some 
people use MIS eboni black instead of the Epson Ultrachrome matte 
black in their 2100 printers? Should I try this when it becomes 
available for the 2400?
Incidentially the samples of Piezography K7 prints done on a 2100 
show a similarly weak black.
I would be very grateful for any advice or recommendations.
Regards, Pete.