I think everyone you ask will have different opinion about machines. So ask yourself these questions.
How much am I willing to spend? Do I want to take a chance on getting a good used one? I think what is really important who will service or fix your machine where you live?
I live where there is Bernina, Viking, Babylock/Pfaff dealers.
So for me I would choose one of them. I have had 3 Vikings because I have been happy with them for what I need which is quilting and all my feet fit my newest machine.