I can reply on the Brother Quattro....fabulous machine. I used my daily for 4-5 years. Never had any problems.
Last year I traded it for the new Destiny....I still have a little buyers remorse. Actually it is "traders" remorse. Short of a few things like the larger hoop and the entry level digitizing it does (that I don't use since I have Floriani Total Control-U embroidery software), the machines do exactly the same thing, with almost the exact features. Sometimes I wish I could have kept my Quattro and gotten the Destiny. Hind sight...20/20.
You will not go wrong with that machine, or any Brother/Baby Lock machine. I have presently 4 Baby Lock machines, not a problem with any of them, and one travels all summer in my motor home.
whatever machine you choose, try to get as many lessons as possible, and don't be discouraged