I use a Miller Synchrowave 180 and run it on a 250/50 circuit. I really like the machine and have never found it wanting. If it were to konk out today, I would first cry and then replace it with something similer in the Miller line. I am not up on any changes made in the last couple of years, so I would look into the features Glenn mentioned. My machine is about 8 years old and I have not looked at new TIG rigs for at least 6 years.
The Synchrowave 180 had stick capability, but I have a very old Miller stick machine under my welding table that I keep hooked up for the rare times when I need to stick weld something. I usually TIG everything, even tools, jigs, fixtures, whatever, to keep less-dullon my TIGing. And of course I have to use it for anything in aluminum.
