I have 3 Bernina machines, and I have a Janome 6500. I love my Berninas, but the Janome is nice also. I think you should try the machines at your local dealers and see which one you like best.
Most Bernina dealers sell new and used machines with a full warranty, and the store where I buy mine also services the machines. They never send machines out for repair. I think that is a very important consideration.
The bobbin winder on my Janome stopped working in less than a year and the Janome repair man couldn't find what was wrong. To have it fixed, I had to pay to ship it to a factory, even though it was still under warranty.
Whichever brand you choose, it's good to know where servicing will be done, and how long you will be without your machine if it needs to be sent out for repair.
Have fun shopping and deciding.