I was going through this process recently, after I took a class on using one of the new Pfaff/Babylock sergers. It was great, just push a button and the loopers are threaded, plus there was an assist for threading the needle(s). But almost $2000 was a bit out of my price range for something I’d use occasionally...
So I researched further and decided that if I do get a serger, I want the Brother 1034. I already have two Brother machines (high-end sewing, low end embroidery) and am pleased with them. And the online reviews and videos of the Brother 1034 impressed me a lot.