In spite of all the above, I still prefer the plain shirt with waist belt I think. It keeps things very simple, and the three-button waistcoat with a plain jacket like an argyl is just not to my liking. It doesn't look bad, by any means, but I do prefer the jacket and white shirt look, much like a tuxedo. In fact, the waist belt and plate simply replace the cumberbund and add a bit of splash with the silver bucle. The buckle--usually a Masonic buckle for me--is the only splash I would be wearing.

When I wear a tuxedo, the only splash is a pocket square (probably white). Otherwise, all if very plain black and white.