I just finished my kitchen with Laminex riven wood grain in sublime teak, Caesarstone buttermilk bench top and splash back, and Preference oak in parana colour. It is an earth tone brownish hue and am quite happy with that. Your greyish colour theme with dark wood accent is nice. There are many shades of wood floor that you can choose to match or contrast with the rest of kitchen.

White-matte cabinets (flat panel, not shaker) and white bench (or maybe epoxy sealed marine ply??...siriuskey can tell you about that), mirror splash. Love the ceilings. I personally would go for a modern, stream-line, no handles, integrated appliances look. This space has real potential to be very cool, even with the slate. It doesn't need any more more texture or darkness. This is a nice kitchen, you should be able to sell it on ebay.

Pure mineral stone would be my pick, from the two laminate colours mentioned. The Caravelle tiles are the feature, so you would not want a bench top that will compete for attention.

Hi Kate. Apologies for delay in answering. Since you mentioned the light grey, I popped out to a kitchen showroom to look at benches and colours for the cupboards. I have a sample of a soft grey Caesar stone with cool white doors. I think this will work. Thank you so much.