I am researching on using EMC2 controller in a real VMC. I have some base knowledge about EMC2. But I wonder much about HW that I will use to connect with the EMC2. I see some HW in the web linuxcnc.org. But I don't know what kind is the most suitable for VMC and has a good price.

Please give me some advices about the HW, especially about motion card that use to control servo motors

Hmm, no responses. This forum may not be the place for advice involving machining centers. Try something here.
http://www.linuxcnc.org/content/view/4/8/lang,en/