Digital BW, The Print

I've finally given up on my Epson 4000.  Mine (my 3rd actually) is 
totally unreliable.  (Thanks anyway, but please, no suggestions on 
this thread on making it work....I have tried it ALL, over and over 
again).    

So, I am in the market for a new 17" or probably a 24" pigment based 
printer.  I want a printer with both MK and PK permanently installed, 
since I will print on glossy and matte papers, both color and B&W.

I'm interested in feedback from any large format Canon or HP owners, 
whether the feedback is good or bad.  I am looking specifically at 
the 24" HP Z3100 and the 24" Canon iPF 6100, but I am still 
interested in comments if you have a 17" carriage or wider than 24".  
I am specifically interested in print quality, ink usage, clogging or 
alignment problems, OEM support, B&W output with the standard driver, 
toning, etc.  

Oh, BTW, is there a good online forum for either the HP Z3100 or the 
Canon iPF 6100?

Thanks for any comments, and Merry Christmas to all.  

Lou