A little update.
Dumped the X,Y nema34 1080oz motors.
Swapped for nema23 566oz. Kept it as a 60Vdc system.
Rapids up to 2500mm/min (98ipm), very smooth and it could easily do more.
Acceleration went up to a setting of 3000 without issue. Seems limitless atm.
Still not the fastest cutter with it's 3000rpm spindle limit. Should be much better when the servo goes on.