As John subscribed,( Lincon) but you have to take in consideration with the Mig the cost of cylinder rental $ 140 -$185 per yr (supergas is the cheapest around these parts) and resupply of gas when it runs out again varies $100 - $160 for an E size cylinder... i have a 240 Uni Mig just getting used to it myself but wish i bought a smaller type that is easy to lug around,,,, because of that fact I do a lot of stick work with my Arc / Tig unit which is another option if you are doing Aluminium or s/steel.All in all get as much info of the Forum and go and test weld from a supply mob they are always helpful,