What works well, and is proven, for this size setup is 80V drivers, 3Nm steppers coupled with a diy torroidal psu that gives 60V - 72V after rectification. Advantage of the diy transformer is you can make it for the exact voltage you want, it gives smooth power and the capacitors absorb and back emf from the steppers on deceleration.

You will need 2 psu's one for the stepper drivers and one for your bob, home & limit switches, relays etc.

These days I'd be more inclined to ditch the pp and go USB or ethernet, more reliable.

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