first of ...congrats on great capture ... second..i think you should stick to your pp ...mizuno's conversion being very nice doesn't give the justice to the mood of the picture, I think. This mood comes from dramatic lighting both in BG and FG not from excessive noise and BW conversion ...BW conversion + some extra grain could work great in case of natural lighting but in this case i think Tim presented it just right ...and when it goes to blow out ...well again ...that's what creating this picture ..dramatic light during sunset ..and that's how sunset looks, parts of the sky are blown out even when you look at it with bare eyes
..i guess....

