Thanks for the comments and opinions about borders on my Almost Amish quilt. I also got a couple of emails from people who either couldn't or didn't submit a comment. After much thought and consideration, I decided that the piano keys border would be too busy. Instead I'm going with this:
Already have a black border finishing at 3" to "float the blocks. Adding a 1.5" finished purple border to frame the whole set of squares, followed by a 6" finished black, with 6" cornerblocks. After it's quilted, I'll bind in scraps of tone-on-tone.
Quilt Day at Upper Dublin Lutheran Church tomorrow. Plan to finish this top and start another project. Can hardly wait!