That is the scottish national. After comparing to the tartan on USA Kilts site I realise I was thinking incorrectly.

If you can compare the weight to your stillwater htat will give a good idea of wher this will fall in the spectrum. If it truelly is 16 oz. the the only downside I see is it is short 1 leather strap. They have a better variety than stillwater when it comes to a 16 oz. kilt since they carry the Irish Natioinal, Blackwatch, and Pride of Scotland. For $86 you can't beat that.