I played around a LOT more with the triangles and framing borders, and still couldn't come up with anything that appealed to me. This afternoon I finally put all the half-square triangle squares into the 2 1/2" box and settled on the simplest border. The original has a pieced border, and I was trying to come up with a different one using the fabric I had left. We all know that sometimes simple is truly the best way to go, and I think that was the case with this quilt top. After all, it was the border fabric that drew my attention to this fabric line to begin with.
It's always hard to show any detail in a picture of an entire top, so here is a close-up of the border for your viewing pleasure.
Again, thanks to my nine commenters -- your input helped me make a decision that I really didn't want to make. If it weren't for you I probably would still be playing with a pieced border that wasn't meant to be.