Whether you’ll be doing the quilting yourself or sending it off a longarmer, it pays to think carefully about what’s best for the quilt. Then factor in the cost, whether it’s your time or the amount a longarmer will charge for various options.
An article by Mari Martin for Connecting Threads does a good job of walking you through the options. She writes from the perspective of a longarm quilter, taking into account the pricing of various types of quilting. However, her advice extends well to quilters who will be doing the quilting themselves.
An all over edge-to-edge design is best, and preferable, for some quilts while custom designs are right for others. Read through the article for help in determining what’s best for your quilt.