One thing that can be worth looking into is the amp draw. If you are in an industrial setting with a big panel, it won't mater. If you are working off a household draw, it can be. Inverters are great for amp challenged settings.
That aside, I would look at the anvil site. Don is a great welder, and would like to go to a Dynasty because it can do stuff no other welder will, but he needs to go to the 7000 dollar model for his business needs, and those needs are met by his current welder. I think describes his setp-up on his old site so you may need to do a cached search for that.
Another option is to see what you can do about the guarantee, I share you concern about inverters, though they do seem normally reliable. I would like to have a dynasty for play, but that means the guarantee for me would be a problem where a commercial shop might run in a week or month what I would do in a year. It might be a possible, or not, to see whether they can do anything about that. Probably not, but it seemed to me to be an unadressed problem.
I have a maxstar, and it hasn't given me a problem. I was after a dynasty, and I ended up with the maxstar sorta on a dare, I wish I had gone for the dynasty... When I am at the welding shop where I get gas, they often have a maxstar in for service. Of course, if people are using them off the shoulder as in the ads, in commercial settings, who knows how well they are cared for...