[AdamHeard]

What is the power rating on the servos?

It might be more cost effective (and definitely easier), to use Teknic "stepper killer" motors (400W is their largest). These are a servo and drive integrated into a single unit, and just run off step-dir pulses. Really takes a lot of work out of the setup for anyone new to the area. We're using them as the XYZ servos on a knee mill we've converted, and then traditional servos with drives for our router project.

If you want to stick w/ existing servos and do new drives, I can help you with that. I spec this stuff all the time.