I have a Millermatic210 mig and a Miller Dynasty 200 DX for my tig and in their price and power range there isn't a better dollar spent, for motorsports and light to medium fabrication{ My consideration of medium is less than 1/2"}
Hope this helps and keep on keepin on,
PJS
For manufacturing purposes the wire feed processes including GMAW have the advantage of depositing lots of metal quickly and have become very popular.
For the small user, Hobbiest, farmer etc. I still like stick process (SMAW). Its versatility is what makes it a winner to me (but I do tend to be old fashoned sometimes).
As for brand I have used both miller and lincoln products and both worked fine as far as I'm concerned.
Bill