For now a 2 stepper x setup looks more convenient from a mechanical point of view.
2 short belts.
lots of bed space
That's what I use you can run them 1.5:1 or 2:1 I used 3.1Nm but with 1610 screws motors from https://www.cnc4you.co.uk/Stepper-Mo...YGH301B-Nema23
with am882 drives from China

I do have a nema 23 4Nm on my mill but don't see a difference in them