Digital BW, The Print

I have been printing decent B/W on the 2200 with an IP v.6 RIP on Hahnemuhle Photo Rag 
188/308 (and rather lush color with this combination). For sales and museum collections I 
have been using an exceptional service bureau to produce quad tone warm neutral carbon 
ink Piezograhic images from Epson 7000 and 9000 printers. They suggested I look into Jon 
Cone NK 7 materials to use with my 2200. Does anyone out there have any ideas regarding 
the success of NK 7 and how it compares to matt black B/W output from the 2400 or how NK 
7 compares to Piezography printed on the 7000 or how the B/W fom my 2200/IP RIP 
compares to NK 7 or the 2400? I know the 7000 quad carbon inks prints have a black shadow 
depth that is magical and the 2200 Ultrachrome inkset even utilizing matt black is only 
adequate by comparison. If you can share any learning curve pitfalls to advoid or just make 
suggestions I would be very appreciative.
Robert von sternberg
rvsmalibu@...