Digital BW, The Print

I am trying to decide on one of these 2 printers for B&W up to 13x19. The Canon seems to 
print very slow in greyscale (which seems to be the best, without casts). Anyone have 
experience with comparing them as to the speed in B&W? And, comparing the usage of ink. 
The Canon has 14ml vs HP 26ml But the ink prices are about equal per ml. Which would give 
better ink use, if either does? Lastly, can the cast be adjusted out of the Canon so that I could 
print regular, and take advantage of the true speed?