Sturdy and Fast all Steel CNC , my first build

[JAZZCNC]

OK,
I get it. I appreciate the help.

Then what would be your exact recommendation?

Drivers, breakout board, nema 23 motors , PSU combination in combination with which ball screws?

Ok for this size and with Gantry upto 70-80KG.

80V Digital drives and recommend Leadshine AM882
3Nm nema 23 motors like these SY60STH88-3008BF
70Vdc PSU preferably unregulated toroidal with correct amperage for all motors.

BOB recommendation is difficult because the one I'd recommend and think is by far the best is PMDX 126 but it's expensive. PMDX.COM - Products for CNC and motion control applications
The next I'd recommend and use often so know are OK boards is this one. OPPB but it's not in the same league has PMDX.

Ball-screws would be 10mm pitch and 16mm Dia for X & Y axis with 5m pitch 16mm dia. Motors would connect to them using 15mm HTD timing belts and pulleys with 1:1 ratio. This lessens resonance which helps on a steel framed machine and it's much more flexible if you ever want better resolution or higher speed has it's easy to apply a ratio with simple pulley change.
20mm Dia 10mm pitch could be used but really not required at this length and would be over kill, would also restrict performance not increase due to extra inertia of larger screw and ballnut.

All the above I've used on several steel framed machines with gantry's approaching 80Kg so know they work.!!