Do a search here on the Quilting Board for Brother CD6000 and you'll find several threads with reviews. There are also good reveiws other places online. I have it and like it, it's worked well for me for several years BUT the throat space is too small to get all but the smallest projects through for the machine quilting. I've done some tablerunners and a lap quilt but there's not enough room for big projects. However, if you don't want to do machine quilting, or plan to have your projects quilted by someone else, it's a very nice machine for the price.
To get more room for quilting I'm restoring my mother's Singer 201. It was built in 1957 and has no horns and whistles but very good straight stitch and more room to get a quilt through it. I'd like to learn to free motion quilt on it. So a vintage Singer is another option -- 201 or 15-91 are workhorses.
Another option might be new Sears Kenmore, which others say is made by Janome and often offers a number of features at a good price.