i am amazed at my Hypertherm 380
i really dont think i need bigger, it clean cuts 3/8"s with a skilled operator, and i have hogged through 5/8's also
it schools both of the millers i have used at twice the cost. (Keith, Cora, and my uncle have the same ones, forget what size it is) I am careless about air and consumables.
mine is a 26amp machine. im not sure i really need anything bigger for what i do, short of cutting bumper Dring tabs out of 3.4 but ruff stuff is for that.