i am an odd duck and say skip the yellow and maybe do the purple or the blue that is in the blocks. you have the gold sashing and i think that it will take and put too much emphasis on the sashing. I would do a second(third really) boarder. maybe even border in the one you don't use so you are not repeating any lines in the quilt like with the gold border. but this is just me. it will help pull and draw on the other colors in the quilt.