Thanks, everyone, for your opinion. I'll go with random. They will have to be rearranged to get all rid of all the matching seams. (The person who hosted this swap said to alternate how you sash them, so you don't have any seams to match.) So, while I'm at it, I'll see if I can get the lights and darks to alternate for a more coordinated look.
Thanks again for the help.
bkay