One thing I have found buying a plasma unit is be sure you have the availability of different tip sizes. Most venders that sell a 60 or 80 amp unit supply it with tips that are for max cutting like a 1.0 to 1.3 tips. If you plan to do CNC plasma and will be cutting different thickness material you want to be able to buy tips for different thickness material. Trying to cut 14 Ga. steel with a tip used for 3/8” steel works but it isn’t pretty and just turning down the amps will not help. Other things affected by tip size are kerfs width and cutting speed bigger is not always better.