If you can find a caddymig, get it.
Otherwise they are discontinued and are being replaced by the rebel.
There are several different models of the rebel, one with mig only( caddy replacement) mig/stick, and mig/tig/stick.
All are different pricing but get you the inverter with Esab's programming for reading arc voltage and keeping output constant. To me, that programming is what makes the esab superior to others.
That said, if you are getting a welder that doesn't read arc voltage, and doesn't change to keep output consistent, don't compare those welders to the Sean caddymig/rebel line. This wouldn't be an apples to apples comparison.
Ex: can't compare an Eastwood/longevity/everlast/Lotos/Chang-shin to the esab. And can't compare the esab to a Miller/Hobart or lincoln 180. The machines do very different things.
That said. If you are going with a traditional machine that doesn't read arc voltage, I prefer Lincoln to Miller. But you could potential save a lot by going with the China made stuff. The everlast/longevity/lotos/Eastwood/northern tool etc are all made in same Chinese factory. Heck if we want to order a container we can get custom colors with NC4x4 logos on them.
Miller and lincoln have released inverter machines that read the arc voltage similar to esab but I haven't welded with either.
If you can afford to get one that reads arc voltage, do it. You will be much happier.
I would buy esab>Lincoln>Miller.