Hypertherm new or used would be my choice. I have a powermax 600 and have never had any problems with it. Hypertherm replaced it with the powermax 45 which is a nice machine, much smaller and newer technology which helps consumable life. You should be able to find a used powermax 600 or 1000 in...
You see Makita 5" grinders in most fabrication shops. I have two and they are great (9005B and 9015DBZ). Mine are made in Japan but I believe the new ones are assembled in USA with global parts (china). Still great though.
I picked these up a couple of years ago and just recently thought I should find out more about them. I searched around a bit but couldn't find much info on the Canadian KC boxes. Here are some pics
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any info would be greatly appreciated!