Digital BW, The Print

I am ready to get a printer. I was waiting to see what happened with the 
2200, to make the decision. It seems that the 2200 is not a good printer 
for someone who is primarly interested in B&W.  So it's the 1280. Now I 
need to select the inking system. It's boiled down to the MIS hextone 
Variable Mix inks or the Piezo driver and Piezo inks. I do like the 
flexibility of being able to select print coolness based on the subjec, 
what I am trying to say and where it will be displayed. This seems to 
argue for the MIS solution.

One the other hand I have heard that the Piezo driver produces a 
smoother tonal range. All my images will be scanned 6x7 or 4x5 so the 
tonal range will be there to capture. Is this ture about the Piezo dirver?

So instead of talking about the merits of imbedded assembly code in a C 
program could someone give me a little help here:-).

Truman