They are all good and pick one with the feature u want. The key actually is to use it consistently. $400 difference over time is not much money. I have my $400 bike for over 10 years, me and my wife still use it on a regular basis. There are two things i don't like with mine. First is I can't tell the resistance level (i got used to it later, but still not ideal), and 2nd is the handle bar can only adjust up and down, not front and back. I thought about upgrade before the pandemic, but I am too cheap to pay for the life fitness IC6 which has all the bell and whistles i ever need.
You can't go wrong with any of these bikes.