Digital BW, The Print

It seems I keep asking the same question, please bear with me.

Is the following workflow correct:

1.  Install cartrages in Epson 1280. Run 2 cleaning cycles.

2.  Open Image in Photoshop CS.

3.  Convert to "grayscale".

4.  Tweak image in Layers or Adjustments using levels, curves, etc.
    (Here is where a major question comes in, will I be "WYSIWYG", on 
     my calibrated monitor?)

5.  Print image @ 1440 or better, I print with no color control 
     checked in the printer dialoge box. Adobe color space.

Is this close?  Any help or workflow suggestions to get me started 
appreciated.  Printing on EEM.
Thanks, Mike Olson