The "Birch Trees" design sounds very interesting, specially if you install it behind the range hood vent and all the way up to meet the ceiling. Any way we can see a bigger sample? Is it a printed detail on glass? or and embossed glass detail?? You already have a "Wood Look" on the floor, visually communicating wood by way of branches would only reinforce the design. I would however consider an oiled bronze, or dark iron color/look (match hardware hinges/drawer pulls) as "Trim" between the subway tile and the "Branches" tiles. Also if the Birch design is printed on glass you will want to carefully consider what type of backing/adhesive you install it with as it will show through the glass.

The benchtop will be dark grey (the ones you see are temporary), black handles and the tiles will be white with light grey grout. The paint on the walls will stay as is (light grey). Thanks for your thoughts guys. Would anyone go all the way to the ceiling? why/why not? Does the herringbone pattern influence your decision?

A nice blue/black white always looks crisp. Take care to match splash tile white to white of doors or it won't look as good. Will look like You couldn't get a match. Everything looks great in a small sample but when you get large areas together you can see they don't match.

As mentioned a couple of photos would help. I would go with stainless to match the appliances etc, leaving the gold for the light fittings good luck, cheers