:o) I so like your way of thinking. I'm headed in a very similar direction, with a slightly wider spread of neutrals though: white, black (although perhaps less on top), grey, and a bit of navy. These aren't yet cemented into place, and I am still working out my relationship with browns and tans. And you are so right: when your core wardrobe is in neutrals, you can throw the occasional colour at it, and it will work.
I am also working on basic silhouettes: button-downs, straight tunics, straight and boot-cut pants, pencil skirts, blazers... None of this is meant to be exclusive, but the core. Add-ons are acceptable, but they have to get along nicely with the core.
I'm going at this a little more incrementally than you, because I've never been good at major turn-arounds. I start heading in a certain direction and gradually get there, if that makes sense.
And I do love that jacket. As a matter of fact, I was drooling over it earlier today myself, in a rather nice coincidence.
