Digital BW, The Print

Please excuse me if this is too general a question. I have been asked to 
print up a portfolio to show. My main printer is an Epson R1800. I am 
experimenting with the Piezo SplitTone inkset. The tonal range is good, 
however, in images with detail in shadow areas, some of that detail is 
missing in the final prints. The results are helped by adjusting the 
output levels in Photoshop, but some detail still is missing. Images 
without much detail in the shadows print just as accurate as in silver 
gelatin printing. Within the next few weeks, I need to select an inkset 
to print--or go back to the darkroom. With CIS being thrust upon us, the 
expenses are higher, so I need to make a good choice. I've also seen the 
recommendation by Paul Roark for using three MIS Eboni inks in the 1800. 
Has anyone had enough experience with the 1800 to make a good 
comparison? Or perhaps one of the other Piezo inksets would give better 
results? Thanks very much.

Marshall