If you are new to serious printing, color or black and white, learn all you
can about color management and monitor calibration.
Also realize that it takes experience/experimentation to develop a reliable
work flow so that the first print you make of an image is consistently
within ballpark range of the results you are looking for.
If the D100 is your only image source there are many ways to achieve B&W
conversion and you need to understand the basic issues.
The 1280 is a great, great printer for color but a little difficult to use
for B&W without experimenting on what settings and paper work best for you.
You definitely want to use black ink only because otherwise there will be a
color tone to the blacks; this is a driver setting. However if you like
tinted, e.g.sepia tone, images the 1280 works great.
Even with monitor calibration you still have to have the experience to
guesstimate how a particular image will print compared to what it looks like
on the monitor. This is image and paper specific.
If you are a serious B&W art printer it would be worthwhile investing in the
2400. However the 2400 also requires a period of experimentation to
understand how to get the results you want. In fact the 2400 requires a
better understanding of printing issues than any other prosumer model Epson
makes.
>> Stay informed about: which Epson printer for b&w prints?