Digital BW, The Print

While waiting to make a decision on wide format B&W, I'm finding that, given 
the amount of prints I've been lucky enough to sell recently, I need to 
purchase a wide-format printer now.  I think I've settled on the 9600.  For color 
output, I'll be more than happy w. a 9600 and the Epson or Atkinson profiles.  
My question is this: what to do for B&W while I'm figuring out whether to go the 
2 printer route (w. some B&W inkset in one)  or the 9600+ imagePrint route?  I 
find the black-only prints on my 2200 using Eboni black to be acceptable -- 
still a bit warm, but good enough as a stop-gap til I get this all worked out.  

So, (1) can I install the Eboni cart and still print in full color using the Epson/
Atkinson profiles?  I would think not, given that the Eboni black is less warm 
than the Epson black.  (2) How well does Eboni black adhere to luster/glossy 
surface papers?  One real big hestitation w. getting a wide-fromat Epson is 
the need to switch black inks and waste lots of $.  If I can print w. the Eboni 
black + OEM inks on both glossy and matte paper, even if I have to spray the 
glossy prints with a fixative of some sort (which one?), I'd be happy.  If not, I 
guess I can switch to entirely matte surfaces, although I'd prefer not to.

Any guidance anyone can give would be appreciated.  This is getting fairly 
urgent, as I have 2 now people who each want several big prints, and a 
potential business client who may want 5-10 big prints.  I'm currently sending 
big stuff out to West Coast Imaging, and while they're good, I'd rather keep the 
profit margin for myself.  (Of course, as soon as I buy a 9600, epson will 
announce an upgrade....)

Thanks!