Yep, Miller owns Hobart. My Hobart Handler 175 (a 200V machine) is one of the best purchases I've made, period. I've gotten a ton of use out of it, and I've been able to do things that I would not have even tired with the stick welder. Stick welding is great for welding up tractors and bumpers on big trucks, in fact I'd rather have a stick welder to do this work than a MIG any day, but stick welders have the problem of learning curve, yes it is not that hard, yes I can weld sticks fairly well, if you give me an hour and a a dozen sticks to burn through, as I've not touched my stick welder in a couple of years, oh, and I'd need some new sticks, as I'm sure mine are all too old and have sucked up too much moisture by now
For ease of use and the occasional use the MIG is hard to beat, the flux core works fine, but is it messy and not nearly as neat as the gas shield welding, IN the shop, outside, you got to use flux core, or build a substantial wind break. Even inside, I find I have to turn off any fans and the AC if I don't want my gas sheilding blowing away.
I would recommend that you get a 200V unit, with this, you will be able to weld just about anything you want to, or need to, with the 100V units, it seems to me that you are always pushing the limits. One other quick thing, you do NOT have to use the CO2/Argon mix to weld steel with a MIG, straigh CO2 works fine, burns a bit hotter and is not quite as neat, but you can get CO2 tanks WAY cheaper than the "Welding" tanks, I use one from our beer servers, you could get one from the Coke guys, you know, for the soda pop, may not be exactly cricket, but it works just dandy for me
I can even weld stainless, with the right wire, which I have one reel of, and I weld aluminum, which is HARD to do.
The advice of going to a real welding shop is good advice, they often have reconditioned machines for sale, not great for a shop that is running a welder 8 hours a day, but just fine for a DIYer who is using it 8 times a year.
If you buy a good welder, and you learn how to use it, you will be surprised at the number of things that you can weld, mixing the two, wood and metal in design and such for furniture is something to be explored as well.
Charlie's comments on fire are really on the nose, I'm so paranoid about it in the Dungeon, I do a super clean up before I weld, and I have the hatch open and run the exhaust as soon as I stop welding, I make sure my wife knows I'm welding and after I'm done, do not leave the Dungeon for at least an hour afterwards to watch for any thing smoldering or such. I wish I had a separate area to weld, but I do not, but I do the best I can safety wise, though some with not agree with even that.
Get a good quality machine, get a gas bottle machine, get a 200V machine, also take a lesson, and get the auto darkening shield, maybe not right away, but get one, and make sure it is a "Good" one as well.
Cheers!