Sorry no photos. However, I had the exact same problem and agonised over this for weeks. If you see any Tungsten Silver Golf you can compare how the colour contrasts against the rear lights. It is probably the easiest colour to keep looking clean. Though, in the end, I decided it was too conservative a colour for a GTI.
I see you have ordered 19inch alloys. Many people recommend DCC + 19inch alloys, unless you are happy with a really firm riding car.