Digital BW, The Print

I'm currently in the market for a printer dedicated to b/w (Lyson, MIS etc) 
and am considering secondhand models of the Epson 750/1200, 870/1270 and 
860/1160. The 870/1270 seems to be generally more available than the other 
two but I would be grateful for any comments or observations, pros and cons 
on any of the printers mentioned with my b/w usage in mind.

Many thanks,

Peter

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