Servos, Drivers etc.

I have finally decided on the servos for my mill conversion. They are;
Reliance Electric DC Servo
Micro 100 Series
NEMA 34 Frame
Model 0660-04-076
Nominal Speed Rating: 1750 RPM
Nominal Voltage Rating: 120 Volts
Back EMF Constant, ke = 68 V/kRPM
Torque Constant, kt = 5.75 lb-In/Amp
Motor Body Diameter: 3.38"
Motor Body Length: 6.5
Shaft Diameter: 0.375" x 1.13" Long
Integral Encoder: Hewlett Packard/Agilent
Model: HEDS-5505 A06
500 lines per rev in quadrature, yielding 2000 counts per rev.
Is there anything that I should consider with this motor that I may
have over looked?
I am assuming (and this is dangerous) that the Geko drives will not
have enough voltage to run these motors at their maximum. Am I
correct? What other drives are recommend (Rutex)?
What will I need in the way of a power supply?
I am using 3/4" x .200 lead ball screws and nuts.
Wayne