I have an old Snapon YA2001a plasma cutter I got in a trade that works good enough for what I do. I would say figure out what the thickest metal you will ever use is, then get one side thicker (if 3/8, then get a 1/2. Etc) and then search for a plasma cutter that can cut that. Also if you are looking for a used one. Make sure to get a small plate of that thickness and try cutting it when you go to look at the cutter. Mine can cut up to 1/2 so so but the thickest I have ever worked with is 3/8 and it is definitely able to cut it. I dont work with 3/8 as often anymore but I know that if I did... it wont be an issue. Best of luck on your search and x12345324 on Hypertherm. They are quite great.