Firepower is made by Thermadyne and is really the same as their Thermal Arc models. Thermadyne is a high end company, just go to there website
http://www.thermadyne.com/. I have a Thermal Arc Arcmaster 185 AC/DC Tig welder and it is bad ass. Much nicer with more fine tuned settings and options than the Lincoln Invertec that I was previously using. I dont have any experience with their migs though.