I am on my third Bernina, an Aurora 430, with a stitch regulator. I use it for just about everything from clothes to quilting, but was really too small to put on a machine quilt frame.
I have a Singer Featherweight that I use to piece my quilts as it has only a straight stitch.
I have my great grandmother's Singer treadle machine that, even tho it's operational, is more of a conversation piece.
I just purchased a Janome 1600P and put it on my machine quilt frame. It sews 1600 stitches per minute, has a 9-inch throat, needle threader, needle up/down position, and thread cutter. These were my requirements when looking for a short-arm to put on my frame.