good stepper driver

i saw this online, i want to use this (or actually something similar
to this) as my interface for my CNC machine. (check out the schematic
for more info.)
http://www.acscontrol.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=ACS&Product_Code=ACS-MOTION-LPT-INTF

I also have a little more info on my steppers, and since i am new to
steppers, i'm not sure about them. please tell me if they are good
enough for a CNC machine:

-- 1 large 8V 1.8 degrees/step 10 ohm phase 6 wire motor

-- 1 medium-sized 16V 7.5 degree/step 65 ohm 6 wire (with 2 red wires)

-- 1 small-sized 7.5V 7.5 degrees/step 29 ohm 6 wires (2 red wires )

-- 1 medium-sized 4.5-5V 7.5 degrees/step 5 ohm 4 wires


I was thinking of using the small motor for the Z axis. I realize the
different voltages are going to be an annoyance, i am hoping that i
can use 8 volts for the 7.5 volt motor, and 12 volts for the 16 volt
motor. I plan on using an old computer power supply (like 200
watts.)and some 8 volt voltage regulators. I could not find any other
info on these motors, i searched for info on all of them on the net.

Please tell me if i am heading in the right direction with this stuff.

Thanx,
Adam