i think the miller 211 is the match on paper for the everlast i-mig 200. the miller 180 is a slightly lower powered unit.
as you have seen, there is a bit of a debate over quality and durability with anything but the major brands here. in all honesty, it's probably going to be hard to tell how that plays out until a lot of units have been in customer's hands for a few years. in many cases, foreign built electronics are foreign built electronics, no matter who has their name on the final product, but there can always be exceptions. i've owned two sharp lcd tv's for about three years. i was recently in the market for a very inexpensive lcd so i bought an element tv, and when i took it out of the box i found that it instantly trips breakers when hooked up. granted, any brand can have the occasional bad product, but look at the odds here when i bought a lesser brand name.
i know that the everlast units use a lot of industry standard parts, but for the homeowner/weekend warrior there is certainly a perk to having easy part and consumable availability. i'm not going to knock everlast here, but it's a plus for the red and blue fans that you can get a lot of parts for the smaller units at your local big box store. walmart, hd, and lowe's carry some lincoln components, and tractor supply has some miller/hobart stuff. i went to tractor supply and picked up a flux core nozzle for my 211 when it arrived. add this to the fact that ebay lists tons of drive rolls, liners, and such then there's certainly no issue getting anything you need in a hurry for the major brands. i have no personal experience with everlast, but i have read where everlast parts have been backordered. again, this can happen with any brand, but with a large name with a national dealer network, you're less likely to see it.
the same goes for unit availability. about the time i was ready to buy a welder, the everlast unit i was looking at ended up being out of stock for a while. in a way, this is good, because they must be turning heads and selling units. then again it was bad because i couldn't have one. i ended up buying the 211 and the spool gun for it. i paid a total of $1040, including shipping. the price i got earlier this year on the everlast unit with spool gun was $1049. the spool gun everlast uses with the 200 is a heavier (more expensive) gun that what miller uses with the 211. i'm sure it might also be possible to work out a little extra discount on the everlast price. for me there was no price difference and i had a local place to purchase the miller, so it was a no-brainer.
at some time in the future when you can go to any welding supply shop and ask for a part for an everlast, and they can easily find and provide you with the part, just as if it were a lincoln or miller, that will be the time when everlast is on the same playing field as the other brands. if they can hold a considerable price edge at that time, then they will really be a contender. until then you have not much more than a paper comparison. even if the product is equal or better, there are other factors that will keep people from converting. some are just perception, and others are tangible factors. until then there are no arguments that will satisfy all the people. every new car manufacturer on the scene over the last 50 years has had to suffer through the same trials - time and quality. there are no words that will replace this.
