I think the silvers (Reflex, Tungsten and Limestone Grey) really suit the mk7 Golf more than any other previous mark (bar the mk4 GTI). It's been said many times, but the sharp lines and creases of the mk7 are shown off to their greatest effect on the silvers. No other colour does that in the same way, but of course all the colours have their own merits.
I adore black cars but only on certain cars. When the mk7 first came out I wasn't sure about DBP being right for it, but when the R was finally unveiled I really thought it worked well with the silver accents and although you lose the contrast with the black styling you gain that stealthy look.
DBP pearl rewards being well looked after and maintained with stunning reflections and deep wet look gloss (if done properly) but takes some commitment, if you are that way inclined. Silvers are the best for camouflaging the dirt well and for longer but can lack the gloss and shine. That said, in the right hands that can be achieved and I've seen some great examples of very good reflections and gloss on silver. But even that comes at the price of regular cleans and quite a lot of effort. But even not buffed to a high shine it still looks gorgeous.
You should play to the strengths of whatever colour you have and accept that it might not give you everything.
Silver - easier to maintain but not on the same level as black in terms of gloss and reflection. However it reflects the light amazingly well and that is a key quality of it.
DBP - a lot of work to keep looking good (though not as bad as many make out) looks dirty fairly quickly, but when clean - few things come close to the jaw dropping reflections and velvety gloss.
