It is a very thoughtful of you to get her something she would want.
I agree with many of the ladies who mentioned to take her shopping. But before you do that, see if you can talk to some sewer/quilters in your area and ask who they would recommend. Some dealerships are super nice when they know they can make a sale but what about future customer service. Quilter's know... customer service is what you will really be paying for especially if you needing to take lessons, maintance, to simply learning how to take care of your machine.