Nick's suggestion to put together your own system is good. I followed that path with a CNC ready Taig, then bought Bob Campbell's Mach 3 Enclosure all wired up and ready to go with Gecko stepper drivers. I also bought my steppers and cables from Bob. Things went together without a hitch. Bob Campbell offers good customer support, in my opinion. This control may be over kill for a Taig, but it will drive a larger system if you decide to move up to a larger mill at some point. At this point I am still on the learning curve with CNC.
http://www.campbelldesigns.com/
Regards,
Chuck Kuhn