Those clearpath servo's don't shake me up. It appears the control loops are totally within the motor/drive with step/dir input, that means linuxcnc will not operate as a closed loop control. All your high end machines are closed loop controls for good reason. Hobby class machines more commonly open loop control. That said, its a personal choice, they will of course work. I would suggest you join and look around the linuxcnc forum, maybe inquire about the clearpath servos even.
That V2E3 I did had dugong drives, made by cncdrives. They were step/dir drives and mach3 was a open loop controller. It worked well BUT now days, after using analog 0-10V drives and linuxcnc for closed loop control, I would never remotely consider going back to the other method. I have done several machines since that V2E3.
Note: linuxcnc can operate in open loop mode but its not the preferred mode.