this is what i do, too... the variegation would be wonderful and you will find a color spread that has many if not all the colors involved. I would rething the stipple, but that's because i hate stippling... I think it is going to be a 'dating' function in the future... people are already doing it much less... but anyway... whatever you put on it will be terrific, it is a beautiful quilt... please take a moment to check out this site, which i use for inspiration for almost any quilt...
http://www.flickr.com/photos/freemot...7625110573627/
the samples here are many and beautiful and just think what the variegated thread would do on that white? gorgeous... see what it does to the black?