I am dreaming of a new machine with a longer throat. I use my 440 on my Bernina quilt frame and it does a beautiful job but I can only do narrow rows of quilting because of the limited throat size. Does the BSR from your 440 fit the 710? That would save some money. But if not, and if you plan on quilting, wouldn't you want the BSR? I find it essential to doing nice quilt stitches.