I've worn both my Stillwater Standard Black Watch and my USA Kilts philabeg....not the "tadtitional", but the philabeg, with ties and a kilt jacket and a semi-dress sporran to the San Francisco Symphony and gotten nice comments. I think that was stretching things a bit for the philabeg, but what the heck.

I wore a Bear Kilt, four yard in his Formal Cut with a kilt jacket and tie that coordinated with the kilt...same semi-formal sporran to a wedding and fit right in with a mess 'o MacFarlanes, many of which who were kilted in tradtional wool kilts.

I've warn my black Stillwater Standard to a few dresier functions, but haven't matched it with a jacket, yet. What I won't do is wear my caramel-colored canvas kilt to a formal function. It's just not the right thing...it's a knockaround.