I cant make my mind up to go with a silver Fenix5 or the slate Grey/Black - my feel Silver is easy to wear on casual occasions with a nice strap - dark watches maybe less!? The reason to get the Fenix as its not only a sport watch, its also a nice looking watch while the plastic Forerunners for example are doing perfect but not as nice looking as the Fenix... Any good examples?
On the Fenix 3hr, the silver bezel signified mineral glass as opposed to sapphre,it may be the same for the 5 series? I'd maybe check that out of its of interest to you.
The silver F5 is nice but what ruins it for me is the bluish plastic sides. It just looks wierd. In my opinion the Slate Gray looks better for any occasion and with any strap.