I might switch the 2 at the bottom right just for a bit more color balance or take the bottom right corner and swap it with one on the top row. I love doing multiple colored borders when I have these colors in the blocks. I would frame it with a small black just to stop the eye and then either do a multi colored border (perhaps pieces 4" to 6" long and 2" wide) Then finish with another black border and binding. Or do several small to larger borders - 1 1/2" black, med purple and med blue (or whatever are your 2 favorite colors in the blocks) and then finish with wider black border and black binding. I just like the idea of bringing out the colors of the various blocks. Whatever you choose will work great given that the base quilt top is really nice - love the variety.