My sister has a Viking with the embroidery and she felt she was wearing out the expensive machine doing mostly quilting. She sews a lot as I do. She purchased the Janome 6600 to do her quilting. I have the 6500 because I bought it before the 6600 came out. We both love our machines. Love the speed AND the automatic thread cutter is to die for. Didn't know what I was missing until I had it.
Don't know much about the Bernina having never really sown on one except in a class once. Loved the machine in the class. I really decided on the Janome because of price and dealer availability.