Hi John I know that charmilles is not on your list but I use a pair of Robofil 510 machines and can recomend these machines, these are big machines and because they are not a submerged machine it is posible to use them for long jobs with the door open. You must over ride the interlock on the door and put up a waterproof curtain to contain the water. As for the machines on your list Japac are old machines and now part of sodick. I have worked a Sodick this was a good machine but seemed to have fragile parts such as the wire thread system which worked alright if it was set right. But if set wrong or slightly damaged no chance of threading. I have never used a Mitsubishi or Agie so cant comment. Hope this is of some use - Paul