I have the 770QE and absolutely love it. I also have a 150QE that I won't ever part with. My 150 is going strong after like 19 years with no trips for service. (other than routine maintenance)
I love Bernina and have a wonderful dealer, which is a "deal breaker" for me.
I don't know what the 570 runs. I got the 770 for the larger throat and the BSR. I love having dual feed.
I don't think I'm any help here!
