I have to add that as others have suggested, so much depends on what you are willing to go with. I don't think that any of your loved ones will care if the thread shows through on the back side of the quilt. As someone said, sometimes people purposely put colorful thread on the bottom so it shows.
However, I've hand stitched many, just so they didn't show through. But now, I mostly just finish on the top, and machine stitch. I haven't had anyone complain or even mention it.