I too have the Janome 6600P. I bought it used from a local sewing machine shop. It had been a one owner and she traded up for a long arm. I spent $1,000 for mine, just a few weeks ago, and I LOVE IT!!! Call around to your local shops and see if they have a used one in.
I have had Janomes, SIngers, my daughter has a HV but I would ONLY by Janome. It is THE BEST!
Good luck with your decision.