Digital BW, The Print

A little more info.  Made profiles for HPR for the following setups
using QTR icc-create:

1) Epson 2200 with NK7, printing through QTR using supplied curve
2) Epson 2400 using ABW mode following recommendations from Clayton
Jones (Velvet Fine Art setting to determine ink load, Light setting
for ABW, plus a very slight tweak in the tone section)

When I printed another image using the respective profiles, the images
were a very close match with just a couple of exceptions:

1) Definitely smoother tonal transitions in the clouds with NK7 -
clear but subtle
2) Perhaps a bit more luminous in the Epson 2400 ABW in the highlights
- very subtle
3) In looking at the L*a*b* values for both setups, I noticed a couple
of interesting things:
   a) ABW mode on 2400 had dmax of 1.56 using above settings, while 
      NK7 had dmax of 1.62; however, there was a little bleeding in 
      the darkest patch for NK7, such that large areas of black would 
      not work well with this profile
   b) ABW on 2400 had very neutral b*, with slightly postive a* of
      around 1; NK7 had same slightly postive a*, but also had b* of
      around 1.5 from L* 45 to 85 or so (a warmer print)

Looking at both prints as a whole, the NK7 was more pleasing, perhaps
due to the slight warmth in the highlights as well as the added
smoothness.  It just looked more "alive", more three dimensional. 
This wasn't a huge difference, but noticeable.

Conclusion:  The NK7 is subtly better to my eye--I think I will stick
with it for now.

--John