When it comes to small machines I don't think you can go wrong with any of them to be honest with you. I know a kid who restores jeeps (I've done some body work for him) and them things are all rotted with in 7 years, he uses a little harbor freight welder, his welds look good and hold. He has had it 4 years and bought it second hand, lol.
that being said, miller 211 is my go to mig and spool gun welder, I also have a 252 (very dusty, last time I used it I welded a piece on my buddies for lift 2 years ago and before that was 5 years a few tow truck bed mounts, both of which I could have multi passed with the 211).
The 211 is dual voltage and does the job, I would change the guns on pretty much any welder you buy, I have one for my 211 with a flex head, it was on ebay for like $50, and it works great. no issues in a few years, a friend of mine bought one and I tried it, I was amazed for the money. I think its htp brand, works well.