I have a 110V chinese suitcase wirefeed, it actually works allright, I burn gas not fluxcore, and it's pretty easy to make a nice weld, it'll work up to 1/4" plate. The bigger a wirefeed welder you have the bigger a wire you can burn, and you can get good penetration on big stuff with them too. they are also much better for vertical welding, etc. That being said I think if you want strength, you are better off with stick. My go-to rod is the Arctec 220XC.. burns beautiful, extremely versatile (can handle some cast), and it's an 85,000 lb tensile strength rod. Only downside of it is it's fussy to restrike an arc. If I'm going to have to do a lot of short welds with stick, I like a 7014, it restrikes perfectly every time. We have a big old Miller Dialarc 30-250 amp... hardly ever turn it up to it's 'high' range.
I would recommend a good 200 amp wirefeed for people starting out.. it's versatile, makes acceptable welds without being an expert welder, just have to learn the symptoms of the wrong adjustments and how to set it, after that it's grind, point, and click.