Digital BW, The Print

I own a 2200 (on a PC) and thought it would be the solution for black 
and white printing.  After a lot of playing around, I've convinced 
myself that it is printing as well as it can(I've tried BO printing 
and it just did not do it for me).  Or at least I was convinced until 
I went back to my darkroom and printed some images.  I've seen some 
truely amazing inkjet BW prints so I would like to try BW inks.  It 
looks like MIS and Piezo will both have 2200 solutions in the not-too-
distant future.   I understand that the workflow for the UT inks may 
be a little more involved, but I am sure I can deal with that.  What 
are the real world differences between the prints made with the two 
systems? Opinions????

Thanks -- Mark