What models of plasma cutters for CNC?

I've read that electrical noise is a problem when using some plasma
cutters with CNC controls. If you use good wiring and shielding
practices will any unit work? What makes/models are you using? I
understand that the Miller's are all good but was looking for something
a cheaper. I've seen some 40 amp $1000 units on ebay but I don't know
if they will work with a PC controller.

Roger