Wow, what a decision to have to make! Not owning an 8yd kilt, I can only rely on what others have said. However, I will throw out that I never needed anything heavier than the kilts I have through last Chicago's winter! Possibly an 8 yarder would have made me warmer on the coldest days, but my reading here and other places makes me believe that it is the weight of the cloth that provides the most warmth, not the number of yards of fabric used in its manufacture, and I know that Matt has debunked the historical considerations for an 8 yard kilt. It just was not done.

I would suggest getting yourself 2 kilts, one box pleated maybe, and one knife pleated, or maybe kinguisse.