As far as 110 units, I've never had any complaints on my Hobart, except for what I'd have to do to run a spool gun.
There are a couple of DVI(Dual Voltage Input) options on the market from Miller, but the downside still comes out to the duty cycles being just above that of an average 110V unit, and the cost is definitely higher.
Millermatic 211
http://www.millerwelds.com/products/mig/millermatic_211_autoset/
Millermatic Passport Plus
http://www.millerwelds.com/products/mig/millermatic_passport_plus/
The Handler 210 and 187 are popular 220v units that easily accept spoolguns, if aluminum welding needed to be done. Yes you can use a standard mig to weld aluminum after switching your liner and sheilding gas, and feed rollers., but that is where the spoolgun makes life easier I know you said that you are limited to 110, I just threw these out there as something to consider.
Hobart also has a new welder out now, the Trek 180, that functions as a 110 welder, and also as a battery powered welder. This is actually a fairly powerful unit, and from the reviews that I have heard.
http://hobartwelders.com/products/battery-powered/trek180/#Accessories