I do use border stripes and they make really great backings... but it depends on the quilting that is being done. If I am having custom LA work done I like to keep the back fairly plain as to show the quilting on the back.. its like having a whole cloth quilt on the reverse.
I love border prints I would love to see more from the manufactures in the way of inovative patterns to highlight the uses. There are some fabrics printed that are spectacular but are what I call "heavy guidance" fabrics....and need just a bit of inspiration/guidance as to what to do with them..