Digital BW, The Print

I am presently printing B/W images on Mac OS9.2, Open Printmaker, 
Epson 2200 and Epson UC inks.  

Are there any advantages to converting to MIS Ultratone inks?  From 
bits and pieces that I've read, both UC (matt and light black) and (UT 
black and gray inks) are carbon so the longevity should be similar.  
And the MIS UT color pigment inks used for tinting are supposedly 
similar to the UC color inks.  

One potential advantage of MIS UT could be smoother tones resulting 
from using 4 inks (1 black and 3 grays) instead of 2 inks (matte black 
and light black) used with UC and OPM.

The last time I checked the MIS website, it says you need either OPM 
(OS9) or QTR (OSX) to use the UT inks on a 2200. 

Has anyone out there used both the OEM UC inks and the MIS UT inks on 
a 2200?  And if so, is it worth converting to the UT inks?  What are 
the advantages?  And if conversion to UT is worthwhile, are there any 
IJC/OPM (or QTR) profiles (for 2200) available for UT on various 
papers?

Thanks,

Dave Gordon
http://www.davegordonpho