I believe I would go with the NM Tartan. It would be a great ice breaker and topic of discussion since you live in that area. Others would be very interested to see it and it would provide an easy context for them to relate to.

They are both great by the way.

As far as kilt belts and straps for the 50" + size, click the link in my signature. I can get you suited up.

Have a great time ordering your new kilt!