I agree with all the other gals ~ Go to a local sewing machine dealers! Interview the dealer, you will be working with them for years to come. How much support do they give? Do they 'train' you how to use the machine.
Also check what 'feet' come with the machine, for quilting 1/4" foot, walking foot and free motion foot (aka darning foot.) My Janome 6500 came with those feet, while other brands you have to purchase separately.
Would you be traveling with this machine ~ retreats, LQS classes or sewing with friends? My 6500 weighs almost 25 lbs, it's one drawback, but I love it.
Good luck in you search!