I like the black in the center if each block and especially, the narrow black separator border and then to top it off, I really like the string triangle border. I saved it to my Quilting Ideas folder. I love string quilts. Have you considered "Dwirling" on the quilt top? I really like that quilting technique on a string. Here is the video on youtube for that technique.
http://www.youtube.com/watch?v=vgX4Ld_lFw8 It adds motion to a string quilt.