I think part of the answer depends on what pattern you have on the top. If it's something that you want to meander all over, then the quilting will look good on both sides. If it's something that will have very stylized quilting, then maybe not so much, but still it might not be a problem. If you can show us the top we might have better recommendations.
I have pieced many of my quilt backs, and quilted them both on the DSM and on the longarm with no problems - but I don't use patterns on the back that require matching up, and the pieces on the back are generally much larger than those on the front. I like to get rid of as many scraps as possible on the back, so they don't stick around to haunt me. Of course some quilt tops just don't call for pieced backs (it's their loss).