Be sure to read about the Singer, Pfaff, Viking merger/buy out while you're considering a purchase. Google SVP buy out.
I have the new Bernina 830 and think it's a perfect quilting machine. But, I also have a Janome 9000 which I love and several other vintage machines. There's a new Janome machine being released, so stay tuned... Have you checked out the Janome Horizon?