First Proper CNC Router

[JAZZCNC]

My thought is ditch the 1610 for a 2010 with BK15/BF15 you can spin it 30% faster before it whips (Ballscrews become skipping ropes at a certain speed the thicker it is the quicker you can spin it)

Nope bad idea with nema 23 motor.!! The inertia of the larger diameter screw and ballnut means more load on motors and less speed before torque falls away.
However there is one way to use 20mm screws while keeping same speed and lower whip. Use 2020 and gear 2:1 this increases torque and halfs the screw speed while keeping same speed as 10mm pitch.

DIYCNC:

There's massive difference between Analog and digital drives. Night & Day difference don't buy Analog drives you will regret it.

Watch or should say listen to these to see difference. Same machine same Motors only change was drives.

Analog https://www.youtube.com/watch?v=WnuLnKtqDX0
Digital. https://www.youtube.com/watch?v=K2-Aub2fetw&t=4s