The thing I would recomend is to be sure that if she is to machine quilt the quilt that the extended throat is very hellpful. I have a Janomie a New home that is over 20 years old and a Bernina that just sits. I have worn out PLASTIC machines. I love my Janome
Also the idea to get a little more than is wanted now is a great idea. I have several friends that purchased a simpler machine and traded up to more stitches. I use the fancy stitches on clothomg more than quilts.
Don't forget the walking foot....
I do not know what Sears carries but maybe go to a Janome store to see what is available before going to sears. I often wonder how much the sals people know. Good luck