Lucky you, getting a new machine. Go for quality and the features you want. I agree with many others, a good used machine is most economic. Don't be too influenced by a great number of fancy stitches; many people seldom actually use them! I would look for the needle up/needle down feature for sure. Most of all sit and actually sew on them. Have your Grandmother do the same. She may have insights you do not re: the machine so listen carefully to which she would choose. Good luck and happy sewing.