Digital BW, The Print

I took a tour around the PhotoPlus expo in New York today.  At the 
Epson stand I viewed samples of the Epson 4000 Pro Colorburst RIP 
output on Epson Premium Luster photo paper (UC inks) and was very 
surprised to see a very neutral print that had little if any 
bronzing.  Maybe it was just the image at hand but the result seemed 
very impressive.  Has anyone else taken a look at this combination 
for RC B&W?

The Epson package has a version of Colorburst that does not allow 
the profiling of additional ink and paper combinations but one can 
upgrade to the full version.  It seemed to be very attractively 
priced vs what I had heard Imageprint was priced at.  What are 
people's thoughts re Colorburst in general?  (Colour or B&W - if 
more appropriate please respond off list.)  

The President of Colorburst made a comment to me that I did not 
understand.  He said that Imageprint treats the printer as an RGB 
printer whereas they treat it as the CMYK printer it is designed to 
be.  Can someone please explain what he meant by this?

Thanks in advance

Steve