Apologies in advance if this is posted under the wrong board, couldn't figure out where it fit best.

I have a 2-3 year old 5' x 10' Precix Servo-based (Delta) CNC-Router and am heavily considering replacing the controller.  Considering Mach3 as the base platform, any recommendations on quality drive interfaces and motion controllers?  This is not a commercial machine, but is used heavily, so reliability and precision is important.