agree w/mikehaugen on either miller or hobart. and that infinite voltage control on miller could be a plus. but i'm not a mig welder, strictly arc. i stepped up from a 35 yr old lincoln ac buzz box (still works great) and went with a hobart ac/dc w/infinite amp control. great to fine tune esp when welding thinner stuff. but that feature may be apples to oranges when it comes to mig, don't know.... am sure someone here could chime in on that. and then there are always the product reviews on line on each that can be helpful in narrowing it down. but like mike said, can't go wrong with either of those two makes.