I am a huge fan of this welder
http://www.hobartwelders.com/product...ed/handler140/
I got mine on Ebay new for 400.. you can also get them at tractor supply.
I have 110 three prong 20 amp circuit (mine are still the old glass fuses)
Never had a problem with blowing the circuit. It easliy welds sheet metal and steel tube. (made a body cart not problem)