Save your money if you intend to only use Mach to provide step/direction to your drives. The laps only put out 3.3v and 5v is absolute for that need. Now on the other hand, if you want to use Mach as the gui,smooth stepper as your step/direction, it might work. This is the direction I want to go if the new smooth stepper and Mach will work with a lap top.
ps smooth stepper is a pulse engine much like the G100 from Gecko, but the smooth stepper as been getting rave reviews from the beta testers.