I have the 6600 and love it, the running foot is fabulous, I also bought the 1/4 inch running foot. It has a ton of features I haven't even tried yet because I was so excited to use it for quilting. I haven't seen the 7700, the women who own the store I bought my machine from have the 7200 machines and they say they are disappointed they switched from the 6600. Have fun, Janomes are fabulous machines.