1. If you are having white tiles on the wall, the same as floor (my preference) then the white bench top will look great. The kick board should be white to match white tiles and the bench will look like it is floating. 2. If you are having 'light' colours, and white basins, then the white bench top. 3. If you go with black benchtop with 'light colour', then I think you need to look at a black basin and keep the kick board black.

Ideally you would want 900-1000mm clear space in front of your vanity and for walkways, unfortunately we don't live in an ideal world and have to work with what we have. 700mm would be the absolute minimum width for a walkway to still allow reasonable passage, although I would be reluctant to go this tight. A floating vanity will help the space look larger and storage can be included in a mirrored shaving cabinet or mirror with shallow shelf above the vanity.

Thanks A&L Windows! The window was already there, just looks so much bigger and brighter after we removed the in-floor planter boxes and transformed the space.

Your ensuite definitely looks like tiles are pink in the original photos. But, then the last photo posted the colour is a greyish, pink. I am sticking with my original choice, and recommend a white vanity top, no veining. You also have white tiles and a white toilet, so this will join those components. Let the vanity back splash be the interest with out competing with another surface.