If you are leaving the cabinetry unpainted, I would consider a very dark countertop, or 2nd pick, Kashmir gold.

I would only consider the Kashmir white or moon white if you were going to stain the cabinets a gray-ish or darker color, or paint them.

What is wrong with the black counters you have now?

The wall color is really horrible with the cabinet color. Really.

Try a different wall color before replacing counters.

the island is too small and we want to increase the size

I would paint the cabinets in the last pic the cabinets and floor don’t look good

ogether at all. You can make a bigger island and just changet he counter on there if the black counters on the perimeter are granite it is hard to tell from the picture. For island counter you could do Cambria quartz Ella .Change the handles and knobs on the cabinets it would look like a new kitchen. I agree the wall color does not go with the cabinets the way they are as for backsplash a simple glass subway tile would be nice or if going with Ella on the island a marble subway tile but 1st I would paint the cabinets.

The kitchen has been painted with back to basics. Which color countertops? The wood floor will be in the picture attached.