I am definatly keeping my 910. Knowing how much I will machine quilt is the question. Justifying the huge cost of the 820. If I decide I can't spend that much, that is where it gets confusing... the 400's, 500's or 600's each series has 2 or 3 to consider, although I am fairly sure I don't want embroidery. I know that I should consider other brands, especially because they offer a large throat space for several thousand $ less than Bernina, but I am so crazy about my 910...it's hard. I know that one option is to buy 2 machines that will do what the 820 would do, for much less $$, but I don't have a huge amount of space for several machines. Keep advising, it does help, thanks.