Trying find what stepper motor, for the least amount of money, that will run the X axis.

This Older 80s Grizzly mill/drill is massive. The book says 1700lbs.
I have a 48v-12.5A PS, Gecko 540 3.5A driver.
Im going toward the NEMA34 motors because of shaft size.

I ran the mill w/ a 1/4"bit, .200 DOC while turning the X handle w/ a ft/lb torque wrench.
It wouldnt go up to 1 ft/lb, the lowest reading. So Im assuming the torque to turn the X is lower than 192oz/in.

Using Keling motors as an example, they have a KL34H295-43-8B (906 oz/in) that can be wired Series at 3.05A.
or the KL34H260-35-4B (465 oz/in) Parallel at 3.5A.

What would be the advantages/disadvantages between both motors ?

TIA