Paul,
I got the Champ 2060 welder/generator, not the handler. My welder only goes down to about 40 amps (I think) and I was burning through the upper radiator shroud that GL sent me. Remember though that I am definately not much of a welder when it comes to hard stuff. For the really thin stuff, I think I'll just stick to my Mighty Mite 110v welder I got from Eastwood about 7 years ago.
From what I saw at the welding supply store, I would say the Handler is an excellent piece of gear -- but I couldn't tell you how well it does on sheet metal. If it's a mig welder (I think it is) then it should be fine. My welder is not -- it's just a stick welder.
Good luck though. Like the others have said, I don't think Hobart makes a bad product. I'm really impressed with mine.
Regards,
John