Someone on a welding forum gave a good tip. If the on/off switch is on the back of the machine, it's an import machine, made in China for both Europe (where the switch is required to be on the back) and North America. If it's made in the US, it will have its power switch on the front of the machine, where it belongs.
My little Millermatic 211 welder... power switch on the back, made in China like all the cheap imports. And yet still commands a Miller premium for what is really a poor machine.
I've heard very good things on the welding forums about Everlast. It's certainly an import, but has local dealers in North America. A number of professional machinists and welders seem to have them and like them. Been keeping an eye Everlast TIG welders. Not sure about their plasma cutters.
I've also heard extremely good things about the import Primeweld Tig 225X. It's just over $800 USD, and comes with an excellent torch and a real gas flow regulator with the float ball indicator, not just pressure gauges.
For a small mig welder (1/2" steel or less), I've heard very good things about the Harbor Freight Migmax 215 welder. They say it's a better machine than the equivalent Millermatic 211 and a third the cost. I can attest that the Millermatic 211 is not a great welder, though.