Our kitchen is certainly not traditional and we do not have any white in it, but we do have very dark wood floors and chocolate stained cabinets. They are very similar stains and the difference is only noticeable in bright natural light. It's not a look I see very often, almost never actually, but it was the only floor color we liked for the whole house and the stain for the cabinets was also the only one we liked of our options. We did not exactly have a vision in mind when we began (we're young, first-timers), and maybe we would make different decisions now, but we like our kitchen... except for still being unable to decide on granite a year later. It sounds like you have a vision and a very nice one, so I am all for the espresso/white combination on espresso floors. I think a lot of people immediately shake their heads at dark floors with dark cabinets, especially when the stains are very similar, because it's not that commonplace, so it's hard to find an instance of it done right, and fear that the kitchen will on the whole be too dark. Without a layout it is of course hard to comment on where the white cabinets should be placed, but what I might suggest is placing the white cabinets in the area(s) that don't get as much natural light from windows and such. This will keep your espresso cabinets nearer the pools of natural light and your kitchen looking brighter overall. Good luck; I think it will look beautiful.

We went with lavender for the walls with our white cabs. We used a BM color, Easter Bonnet, but then had them lighten it after it was done to 75% because I wanted more contrast with the deep purple in the adjacent den, BM's Purple Rain, which is the best color ever ;). Dh did not see the need to lighten it nor the difference when I brought the paler color home and started to repaint. Once I got half the wall done, he finally "got it" and appreciated the difference. Our counters are white-ish with a little gray and taupe in them and tiny specks of black. They look like white from afar. With the chrome accents and gray and black floor, it all came together as perky yet mellow. Here is a link that might be useful: BM's Easter Bonnet

IMO the black swallows light in that space and if you love the Muslin that is the color I would paint the cabinets but in a semiglosscabinet paint A simple white is not going to work with that counter. A simple subway tile in a color from the island , choose that after painting the cabinets. I sure hope you are having these painted by a pro.

This is the combo I have thru out my house - Alabaster walls and Extra White trim. I love it in every room.