I piece on a Featherweight, don't think anything will match the pretty stitches, except a treadle. Both are straight stitch machines.
I love my Pfaff with IDT built in walking foot and I can do a full size quilt on it. Anything bigger than a full size is hard to do on a regular sewing machine. I don't care how big the harp is, at least that has been my experience. I've set up all kinds of tables trying to work a large quilt, but have never been real happy.