I have a singer 66-16 and it stitches and quilts super, but if you want fancy stitches that it doesn't have. It has an opening approx. 9" so you can quilt quite easily. Haven't used it lately tho cause I'm working on a Log Cabin version where I embroider the center block and build out from there. Not enough room for the cabinet the machine is in and the embroidery machine too. You can find these older machines for very little depending on where you live. The other nice thing is you can service them yourself and still get parts. The bobbin is also a good size compared to some of the newer machines. Take a look in the Vintage forum here on this board you will be amazed at what people are using for quilting. there is also a photo section for quilts made on the vintage machines.
Good Luck
Suzy