Digital BW, The Print

Let me add a little more here.

I tried my 1100 black only, and it gave the "grainy" available light look you like to a certain extent, but there was also some microbanding on close inspection of the plain areas with no details to hide the artifact.

I, personally, find visible microbanding about the worst artifact, and would not want it in any of my prints.  Due to this being a common problem with black only printing, for the 1.5 pl 1800 I developed the "3 MK" approach.  I used 3 black inks to hide the microbanding.

The 1.5 pl printers (1800, 1900, 2000, 1400 and other Claria printers) may not have enough of the "grain" to meet your aesthetic requirements, but take a look at http://www.paulroark.com/BW-Info/R1800-Image-Structure.pdf to get some idea of the image structure.  I, personally, found the 3MK approach too grainy in the midtones for my tastes.  The approach tends to make surprisingly smooth highlights (very fine dots), but in the midtones the 3 black inks' noise is somewhat additive, resulting in graininess that may give you want you want -- and with no microbanding due to the 3 inks firing.

My old write up of the approach starts here: http://www.paulroark.com/BW-Info/R1800.htm 

The approach requires QTR.  It also can be run on any 1.5 pl printer if it is supported by QTR and you can linearize profiles (only a flatbed scanner is needed).

Paul
www.PaulRoark.com