Digital BW, The Print

Hi all, I'm in the process of switching to digital printing, and would 
like to ask for some guidance. I've purchased an Epson 1280, along with 
the UT2 K inks (both Ebony and Photo black) from MIS. I've done some BO 
test prints, and they look a lot better than I've anticipated. 

I'd like to get feedback from someone that has experience printing both 
with BO and the multi-shade monochrome kit? I understand that BO 
printing alleviates the artifacts of color inks, and helps in keeping 
the print appearance close to of a wet print. 

I'm thinking about purchasing the MIS five shade UT2 kit. Would I need 
to worry about color casts, lower d-max, etc? Also, does anyone know 
what is the color makeup of the five shade UT2 kit for the 1280? Thanks 
for your help!

Robert.