I think I commented on your prior thread that I have the Pfaff QE 4.0 and love it. I also have a Brother 4500Duetta and love it also, but purchased it mostly for embroidery. I usually take the Brother when I go out of town and especially on retreats, just because I can sew, piece, quilt or embroider - altho with all of the embroidery attachments it takes up twice as much space.
That being said - if I'm sewing, piecing or quilting, the Pfaff QE 4.0 is the sewing machine of choice!!!