I just bought the 6600P a couple of months ago and I love it. It is really easy to work with; I love the snap on feet and the bobbin winder. Oh my gosh just having those two things on this Janome has saved me many minutes of fumbling around! I will be using the Accufeed foot very soon, and so far it hasn't gotten in my way at all. I bought the extra quilt plate and foot but all the other feed came with the machine. Oh, my dealer also said that the 6500 would be fazing out shortly. I don't know if that's true, but I guess we'll see. The quote I got on the Horizon was $2500 and the 6600P was over a thousand dollars cheaper! I couldn't afford that difference. Good luck and let us know what you decide.