I have the 6600, and totally love it. It quilts beautifully, the accufeed system, is the 'foot' that you bring down to quilt with. I have had no problems with the backing folding, or messing up, at all. It is worth every penny. Don't be afraid to go see a demo at your Janome dealer, that's what they are there for. If you feel pressure, just say, well I am still looking for ideas, and am having a hard time deciding.