I plan to use linuxcnc/EMC. EMC was designed as industrial class machine control software, just like apache is an industrial class webserver, if you have already gotten over the screaming hysterics of IT'S NOT WINDOWS, I'M SCARED!!! Why not use great free software that you are free to hack the crap out of if you want to?

PS, just incase a windows VS *nix debate does start, please take a look here and choose operating system family from the category option.

List Statistics | TOP500 Supercomputer Sites

There is a reason why windows based supercomputers are a rounding error... ;)