Component choice - given availability.

Hi All.
Can anyone suggest available(in stock) hardware options to drive a 3 axis mill equipped with:

Stepper Motors.        Nema23 FL57STH56-3008B.

Stepper motor drivers.
Motor Power Supply:    18-50v DC.
Current:              4.2A (Peak) Max.
Current control:        PWM.
Control inputs:         5V logic from current sinking (NPN) interface, 15mA typical.
Microstep:            128 (25600 steps/rev.)Max. 15 settings selected by dipswitch.
Max Pulse Rate:        300kHz.
Insulation Resistance:   >500 mega ohm (@ 20deg C).
Dielectric strength:     500V AC for 1 minute.
Cooling:              Heat Sink.

Ideally suggestions would include capacity for (in future) an additional axis, rigid tapping and positional feedback.

Mesa seems to be a popular option but I am not sure if any of their available products would work with my setup?

I assume a fairly basic PC would be adequate with a Mesa type device?

Thanks All - null.