I have a serger and have never wanted to serge the edges. The only way I would do it, was if I had a fabric that was almost shredding on me. That would probably be the best method to stop the raveling. I don't do pieced borders very often, so don't have any problem just sewing the binding to the quilt. Now, I will be working on my Bali Wedding Star before too long, and am leaving all the arcs as the outside border. I have stay stitched around each arc to prevent stretching and to keep the seams from coming apart. I may have to do another stitching around the arcs after quilting and before trimming just to keep everything lined up, but that will be the first time and only because this quilt will have a lot of stress and potential movement in the edges.