Love the look of the car, i think the silver grille matches the light clusters and black wouldn't be my choice and i like the respective lines that gives, personally i think the black wouldn't look as good, but that's just me. I have to say i originally thought white wouldn't suit the Z but those i've seen on the road look fab and it's no surprise you love the car ! I guess it boils down to how do you feel about it, if you're asking the question then i guess you're not 100% sure about the silver, perhaps that is an answer in itself?