I bought my 6600 over 4-1/2 years ago, and specifically chose it because I wanted to do my own quilting. And I am more than happy with it, it is a great machine.
I have the drop in table for it, all the extra Accufeed feet, and the convertible free motion feet set, blue dot bobbin for fmq and single hole stitch plate, all worth having. Stitch quality is excellent, lots of features. No free arm though if you want that.