In search of inexpensive, but good servos for mill conversion?

Hi group,

I am in search of some inexpensive servos for the conversion of my
Rong Fu mill. I don't have the money just yet, but once i figure out
what the costs are, I can start budgeting for it.

I will also be needing some ball screws for it as well.

Does anyone have a feel for what the torque requirements are for that
size mill? It is the round column version with a 2 Hp spindle motor.

Thanks!

Chris