Hi Lil, I believe your original plan works much better than the revised version. While the notion of ideal working widths is great, the larger problem here is the post. I worked on a project very similar to this last year where a post could either be connect to, or separate from the island. What we found was that by separating the island the space between island and post became very awkward. It's not enough of a space to comfortably walk through or be seated at the island in front of. Instead of your room feeling open and generous in proportion, it is going to start to feel cramped and awkward. We have a kitchen in our showroom (Kitchen Studio Tauranga NZ) with a 6ft gap between bench and back wall and it works wonderfully. It allows someone to work at the sink and a second at the island with ease. Stick with the original plan. It will feel a lot more spacious, without compromising work flows.

Hi Sian If it wasnt for the foot rail, I'd thought the stool was a side table and looks uncomfortable to sit on, but try Gumtree - you may find pre loved Vincents for a song. I'll save you some legwork, or fingerwork :) check these out. http://www.mattblatt.com.au/Barstools.aspx?s73#p=2&ipp=28&f=v73-pv71-nBarstools-t71-c0&o=Default https://www.justbarstools.com.au/ https://interiorsonline.com.au/collections/all/category-bar-stools I love the choices in the last one.

What material is it and by integrated does that include basin?

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.