While I have not used the Easy Drivers, the power supply we choose for our Zen Toolworks 3 Axis CNC machines is a 12V 5.0A Power Supply from MeanWell. It is listed on our website for sale for $35.00 + Shipping. MeanWell has proven to be a very high quality power supply, however there are several impostors out there claiming to be MeanWell so be careful. The ones we sell are actual MeanWell Units. Each Nema17 motor draws around 1.0A so this power supply will have ample amount of current for your machine.
Here is the link:
Zen Toolworks: Mean Well 12 V Driver Power Supply
Best of Luck,
B.J. Warren
Zen Toolworks