What's a good intro welder for subframe connectors?

I've got a Hobart 140. Good welder. Added a 75/25 bottle after running flux wire through it. My welds are much better with the gas. From my understanding, low end welders have a harder time with thin metal than more expensive as they just don't go low enough. I half farmed out my sheet metal work on the Barracuda (I helped while a friend of mine did the welding).