Solid White inner border, black and white print middle border, and a b/w half square triangle outer border. HST would compliment the inside blocks because most of the blocks can be made w/HST. Flying geese might work, as would simple squares set on point. I would use three borders to get the width I needed on each side, so it wouldn't look like I put huge borders on the quilt to make it the size I needed. If you don't have enough of the fabric used in the quilt to do the borders, you could always mix in other b/w fabrics that have similar designs.