Digital BW, The Print

I've got a 1280 and a r220, I don't want to have redundant printers so
I thought I'd setup up one to be a dedicated black and white printer.
My question is which one to convert to a black and white printer. I
know this is very subjective but I really don't have a preference in
the size I print, I mean it is just as nice to print large black and
white prints than. I am just looking to have the best of both worlds
at a reasonable cost.

Thank you,

Brian