Is this a recent kitchen installation? Could you ask cabinet maker to adjust the base units across to close the gaps up a bit more? Even if the splashback needs to be re caulked, better than trying to infil with stainless steel angles.

Okay, so as expected the matt suede surface is more expensive, not sure how much yet but when the builder says price on application, I can imagine it will be a fair bit more. Anyway, we'll see but something to take into consideration I guess... In the meantime, I was going through my idea books and found the photo below, which I kind of forgot about but is one of my absolute favourite kitchens... the point is just like the photo, we too will have a wall cabinet in matt black, the back of the island in matt black and oak floor boards in a natural/textured matt finish... so now I'm thinking maybe too many matt surfaces, interestingly they have gone with a polished stone top which I think is reflecting the light nicely... Our floors...

We have had composite stone bench tops for many years. First was Askilan (not even sure this is around anymore), then caesarstone which we had for over 15 years. It had one tiny chip at the edge of the under mount sink. It had a gloss finish in a white fleck and never showed a mark or stain. Replaced with a new caesarstone when we renovated the kitchen, this one has a Matt finish and shows more marks but us just as easy to clean - I love it.

I have a top Mount double bowl sink in my kitchen with stone bench tops. I don’t think it looks cheap.... AND, the second unused hole is not just “filled” by the plumber, but a “faucet hole cover” is installed and will sit almost flush with the sink surround. If you have under mount sink in your kitchen, how are you going to have dishes draining, before immediately hand drying. You will have to put some kind of draining board on the STONE, and that will look cheap. But if under mount sinks are included in the build, then go with that. But they don’t include somewhere to place pots and pans after washing and before drying by hand. Because you have stated that you are only having a single bowl sink in the kitchen.