I Don't have a picture as we are just beginning to build.

I'm no expert, but I'd have to say it depends on the granite. I recently re-did my kitchen with cream cabinets and charcoal island. My granite is the same for all surfaces (it's called White Dawn) and I like how it is all tied together. I've also seen some beautiful kitchens where the perimeter counters are a solid colour, like absolute black, and then the island has a much "busier" granite or quartzite as an accent. I think also, that in a smaller kitchen, it's best to keep the countertops the same.