Digital BW, The Print

Epson has refurbed R1800s and 2200s on sale for about $400 after 
rebate.  I'm looking for opinions of the cons of each printer for B/W 
printing with inksets such as MIS's K4+, UT7, UT3D. The specs of 
nozzles and dot size look good for the R1800, but...?

Thanks.

Jeff