i have used hobarts for years as well and have always been pleased with them. i think it's good advice to go with a 220 unit if you can at all. i had a 150 or 160 hobart handler that was 220 and used it for years. you have the flexability to weld thin body panels or thicker steel as well. i haven't used the flux core stuff a lot but i think it usually looks like it has pin holes in the weld, structurlly it's prob as good but it you wanted it to be water or air tight i don't think it's as good.
i have welded body panels 15 -20 years ago when i was in high school with a arc welder as a slow process of start and stop before it burns thru but i wouldn't do it again. but you know, whatever floats your boat. it's hard to beat a good gas shielded mig welder for body work.
