Digital BW, The Print

Hi,
I've been tempted by the low prices of the 2100 now that it's being phased out. 

1. Does anyone know how OEM ink costs are compared with the HP 95 cart? (It's breaking the bank at present.) I could put Eboni in the black position, which would make it cheaper.
2. Is there any rip that enables you to print only with Black and Light Black? It always seemed curious that Epson didn't offer that option.

Secondly, does the smaller droplet size of the 21/2200 printer's replacement model mean that Black Only printing will now be much better than before?

thanks,
Richard
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