Digital BW, The Print

You don't necessarily need to switch all of your customers at once. 
Offer both. Make the ones you'd prefer to do (I'm assuming the digital 
prints) the cheaper option. Those that still want the fiber based prints 
can still get them, you'll make a bit more for that and you'll be able 
to move toward digital prints for most of your work.

I'm using this philosophy as I'm starting up (slowly) a portrait and 
event studio. I'm providing only digital proofs in the base price and 
charging $25/roll for printed proofs. If someone complains about not 
getting prints, I just ask for the $25 per roll and cover my difference 
in expense to have them machine printed.

Just make it part of the pricing scale like lots of people already do 
with RC vs. fiber prints, warm or other extra toning, etc. Just make the 
  process you WANT to use the cheapest and arrange the other services 
accordingly.