Digital BW, The Print

I am using an Epson 1200 and have been experimenting with various ink 
systems searching for the ultimate black.  I have used Cone's Piezo 
system and was not happy with the tones.  I just bought the MIS 
variable mix system and still not happy.  Before trying yet another 
combination, what are the groups experiences with the other MIS 
combos...ie full spectrum with the Piezo driver or the original quad 
system.  I have also used Black only printing with a Epson 1270 and 
epson oem ink and love the black tone.  I have learned through the 
group that this is the least best way to go because of color fading 
and metamercism.  What combo should be used to garner the best blacks 
with the least amount of fading.  As usual thanks in advance for the 
help.

Rick Zeidman
www.morgan-baily.com