OK, so progress has been slow but i've finalized and purchased the electronics.

PSU's: 70v 5.7A Switchmode PSU.

Drivers: 2MA860H.

Motors:
Manufacturer Part Number 23HS45-4204S
Step Angle 1.8°
Holding Torque 3.0Nm(425oz.in)
Rated Current/phase 4.2A
Phase Resistance 0.9ohms
Recommended Voltage 24-48V
Inductance 3.8mH±20%(1KHz)
Weight 1.8kg


Thanks to CliveS and the others on suggesting not buying a kit.

More to come shortly. there have been some more changes :)