Digital BW, The Print

Thank you Clayton and Tyler for your replies.

Clayton, I was aware of your informative article before posting my
question. I also understand that is a matter of choice to CM or to use
the ABW, I was just wondering whether it would be better to combine
the two. 
Now a related question, since I know your prefferance in BO printing,
under which method can "only" the 3 K inks be used?
If you choose neutral tone on ABW and 0 wheel settings, does this
means that only the K inks will be used? 

Tyler, what do you mean with single channel icc profile? Is it like a
dot gain profile that can be embedded on a grayscale image? Does this
method utilizies only the 3 K inks? 

At the moment I'm not entering into the conversation two other
variables, trying to keep things "simple" and these are Qimage and QTR.
I will later try to see how I can implement Qimage or QTR printing
with the R2400, I just want to say for now that the raason I'm not
converting my b/w images to grayscle is Qimage.