Digital BW, The Print

E-bay has a bewildering variety of reflection densitometers. The 
three groups that seem most available and useful are the x-rite 310-
320, 810-811 and Eseco R60-R75. Prices seem relatively close when of 
similar condition and equipment. The information available on the 
manufacturers' web sites is pretty terse.

Which would you suggest (or perhaps others...) for measuring ink 
densities on various papers?

Thanks,

Roger