Hypertherm and Thermal Dynamics are the only ones I know of who make their own torches. They would be my 1st 2 choices. However I had a Hypertherm 45 that Blew up 30 days after warranty and they would not help or cut a deal on a new board Even the infamous Jim Colt wouldn't help. So do pay attention to warranty as well. As far as out put amps as stated above you can't just go by amps you need to look into Kilowatt output, that's where the cut power comes from. I'd say any plasma is better than no plasma so just choose your budget and know that after warranty they are all a total crapshoot.