Honestly my Stillwater Heavyweight Saffron is my favorite kilt for most occasions. I've worn it knocking around the house, to work, to Burns dinner with a kilt jacket (semi-formal), and with a PC Style coat (formal). Kilts in general can be dressed up and down very easily with the right accessories.

Out of my Fraser Hunting, MacKenzie Weathered, and Gordon, this is the one kilt that I get the most favorable comments on.