I just recently purchased a used Pfaff GrandQuilter Hobby 1200 and the Next Generation frame setup, including the Quilter's Cruise Control for $1,500. The Pfaff GrandQuilter Hobby 1200 is a 9" throat machine. I have not used it enough to provide much commentary. But so far the stitches have looked very good and even on both sides. I've heard some have trouble with thread breakage, But I have not had that problem.
The regular price on my setup is about $3,300 through a Pfaff dealer. The Q-Bot, which I have been seriously considering (My free motion quilting leaves something to be desired, thusfar.) is almost $4,000 alone. Q-bot comes with about 30-40 designs, which may be why the fan was done in pieces. However, it comes with software to create your own designs on your computer, whcih can then be run on the Q-Bot.
Make certain you are getting the Quilters Cruise Control included. Q-Bot will need this to work properly and would be an additional $500, if purchased separately.