Digital BW, The Print

Quick background...

I got into b&w inkjet printing a year ago with MIS 6-tone inks on 
Epson 1200.  I scan 35mm film with a Nikon LS-2000 (16-bit).  While 
amazed at first I soon grew critical of the output.  I was using the 
Brandin curves at the time.  Under close scrutiny you could notice 
subtle posterization, lack of tone in highlight areas, fuzzy edges due 
to what looked like ink bleeding (Concorde Rag, Somerset Enhanced), 
etc.

I decided to give Piezo a try and was successful from the get-go.  The 
same prints which looked terrible with MIS were terrific with Piezo.  
The only problem with Piezo, to me, is the cost and the incessant 
nozzle clogging.

I am now reading about the Roarke curves, Variable-Tone inks, 
Full-Spectrum inks, etc.  This latest news has me contemplating MIS 
inks again.

1. Any comments on the Brandin curves?  Are the complaints I list 
above known problems with the Brandin curves?

2. Will I get better results with the Roarke curves (compared to the 
Brandin curves)?  Are Roarke curves available for the original inks or 
do I have to use the Variable-Tone inkset?  I do admit that the 
variable tone capability is enticing.

3. I am really intrigued by the Full Spectrum inks and the fact that 
they can be used with the Piezo software.  Alas, I just sold off my 2 
1160 printers and there does not seem to be a hextone set of these 
inks available.  Are there plans to produce hextone?

4. Any comments on the comparative quality of a Woolf workflow 
quadtone print vs. a Roarke Variable tone print with zero blue?

5. Ignoring cost... would anyone care to give a perfectionists opinion 
on whether the Piezo driver with the Full Spectrum inks gives superior 
prints to the Epson driver?

6. I'm not into the whole "blacker blacks" or "cooler tones" topics 
that are issues for many.  My priority is dot-less output, continuous 
tone, no posterization, near-zero ink bleed.  Given this would anyone 
care to rank the quality of a) Piezo ink and b) MIS inks with c) Piezo 
driver and d) Epson driver?

That's a lot of questions but thanks for any and all input.

Mike Dawson