Digital BW, The Print

I am in the process of getting involved in digital B&W, and am 
beginning by trying to use the MIS standard ink set with the Epson 
700. This is a six ink printer 8.5" width, and precursor to the 740, 
870, 875 etc that are now available. My long range plan is to learn 
with this printer, then get an Epson 1160 or 1200 for future B&W 
work. I could use some guidance. First, if anyone knows of a workflow 
for this combination, I would appreciate learning about it. I have 
tried Paul Roark's workflows for the Epson 1200 and 1160, but neither 
seem to work quite right on the 700. I appreciate Pauls response to 
my previous messages.

What I am doing now is using the Quadtone feature of Photohop 5.5, 
and creating my own curves. I set the colors to black, cyan, yellow 
and magenta in that order to lay down the darkest in first and the 
lightest last. I am setting the curves to try to generate a printed 
grey scale to match a known grey scale. My thought was that this 
would allow me to more directly control each of the inks in the 
printer. I am getting pretty close and the B&W images look quite 
good, and the grey scale isn't bad, but not yet perfect. My question 
is: are there any disadvantages to doing this with Quadtones as 
compared with placing the image in RGB and controling the 
these "colors" using curves, as apparently was done by Paul Roark?

Howard