I use the standard wheels and trims on my Vitesse, which is a personal choice.
Dunlop and silver Minilites are period, though I don't remember anybody fitting Minilites on a Vitesse back in the 1960's. Some did use the 5.5 inch Dunlop, but most used the 4.5 inch J type. Standard on the late 1600, all 2 Litre Vitesse and the 13/60 Estate.
Remember when you increase the tyre width then it will reduce the wet performance as the vehicle weight will be distributed over a wider tread. The results is less weight at any given point on the tread. Less stick. 185's get interesting in the wet on a Vitesse.
Dave