About a month ago, we purchased a Juki 98qe and Little Gracie II frame with the Grace Sure Stitch (similar to the QCC), and I love it. I've quilted three quilts on it so far, and am constantly looking for excuses to use it. We paid $1700 including shipping, and I would highly recommend it to anyone in the market for one.
I can't really help you with the HandiQuilter, as I have no experience with them.
I have a friend who has the QCC and loves it.