The only thing I don't get about this board is what the female plugs behind the axis screw blocks are meant for. Anyone can explain that to me ?
I think you will find that they are an alterative connection for the drives dir/step pins.

You don't say what your driving the machine with ie ball screws etc slaved axis etc. ?
.
The steppers you have have a high inductance and the Zapp ones will be much better http://www.zappautomation.co.uk/elec...tor-48577.html
If you are going to build another machine and want to use the bits again go with AM882 at least as they have stall detect and run them at about 70V. Some of the newer drive can be run from AC as well.
Building your own PS supply will cost about £45 ish