BP Conversion ???

Boy, I have looked all over the place, and gotten some great
information on BP CNC conversions. I am a little confused, so please
be patient, as I am sure that this has been asked 1000 times already...

It seems like the best way to go is with ballscrews on X & Y. Who is
the most cost-effective supplier of BP ballscrew kits?

I plan on using the Gecko servo drives, but what motor is a good match
for them (i.e. voltage, torque, current, rpm ratings, etc) ? I could
not find any motor details during my searches.

I plan on using EMC for control. Joe