570 oz nema 23

Im looking at those nema 23 stepper
http://www.automationtechnologiesinc.com/products-page/nema-23/nema-23-three_eighths-inch-dual-shaft-with-a-flat-570-oz-in

Cutting area would be around 1000mmx15000mm
Aluminum framed cnc that will be cutting wood plastic and aluminum
Cncrouterpart pro rack and pinion on x and y axis and ballscrew on z axis

I was thinking about using a tb6600 but after some reading came to the conclusion that it wont provide enough to make the stepper work proprely so im going to go with the leadshine mx3660

The 570oz should be fine on y and y axis but would it be overkill for the z axis ?