Digital BW, The Print

I'm leaning towards picking up a Canon printer for doing color work 
primarily for its speed (as much as 5-7x faster than a 1280 with 
equal quality), individual tanks, and user replaceable printhead.

I'm leaning this way because the Epson I had intended to start 
running with MIS quads has been exhibiting problems with random black 
lines in the printout.  From what I can gather online (and advice to 
the contrary would be welcome) this means that the printhead is kaput.

So, I may be getting a Canon to do my black and white as well.  I 
appreciate the idea of a replaceable printhead as this is not the 
first problem I've had with Epsons.  My question is this, anyone out 
there using a Canon for black and white?  Might I be the first in 
these uncharted waters?  Anyone want to chip in and get Paul Roark a 
setup so he can create his much admired curves for these printers?

Thanks

Gabriel Regalbuto