Digital BW, The Print

I've been reviewing all the posts on the various Epson groups 
about metamerism, because I have to make a final decision 
about what inkset to use in my 7000 for printing a portfolio of 
black and white photographs. I have a pretty good sense of what 
the discussion has been, but still have a few questions.

Like many people, I would absolutely love to be able to print 
black and white images using color inks. If this is impractical 
because of metamerism, I am willing to dedicate my 7000 to 
quadtones, at least for now.

As I understand it, all the pigmented ink sets have some 
metamerism. Epson's pigs are the worst, Generations is pretty 
bad, and Cone's color piezos have little metamerism in most 
situations. However, Cone's inks do not give a good rich black.

Questions:

1. Is it feasible to use Generations black with Cone's color inkset 
to get better blacks? (I have seen reports of people mixing 
Generations black with MIS quad inks and Cone quad inks, 
which makes me optimistic. On the other hand, I have seen 
reports that adding any Generations black ink causes noticeable 
metamerism to appear.)

2. Is there any other way to print grayscale images using 
long-lasting color inks without getting strong metamerism or 
weak blacks?

3.  Why is metamerism not a problem with quadtone inksets that 
have pigments in them? (Especially when folks use Generations 
black in the mix...)

Thanks in advance for any help.

--David Stock