If you want the wall and floor tiles to be the hero in your bathroom I recommend you keep the vanity very simple. The white cabinet you have will be least obtrusive with a 'white' top. I love the elegance of stone and man-made stone is generally more durable. Check out Caesarstone Organic White or Frosty Carina. Although Frosty Carina has more pattern than Organic White, it's quite discrete so shouldn't compete with pattern on the tiles. If the tiles are charcoal or a dark brown/grey then either should work. Love to see a photograph when it's finished, whatever you decide.

Nice. Colours blend well and look fresh and love the big mirror

Hi Louise, We are located in Melbourne and our showrooms are open. We suggest the Aerinsea 900 vanity for a coastal/Hampton look and it is a floor vanity so you don't have to change the plumbing. https://fontaineind.com.au/aerinsea-900-vanity Or for a more modern Coastal look, we recommend the Hamilton 900 https://fontaineind.com.au/hamilton-900-solid-ash-wall-mounted Good luck!

. Colours scheme looks great. I don’t think there are any rules, but eclectic mix might be good for that vintage thrown together look. It may depend on how the fittings turn out and what you decide for sink and bench top. My thought would be to steer away from shiny modern taps. Here are a couple of pics for inspiration, one looks like it has similar fittings on cabinet to yours.