Yeah they all sound about right (though I'm not sure what wool chinos are). My grey cords from All Saints have been a revelation. They are so versatile, and different from what most people wear, without being garish.
I know you said you are looking for minimal, but have you considered mixing up the colours with the chinos? I recently bought a burgundy pair. I know they are worn by every tom dick and harry, but if you wear them with the right things you can still differentiate yourself. I'm a pretty minimalistic dresser too, but have found them really easy to incorporate. Another option I will purchase really soon is a pair of olive green chinos. Nice and muted. Will look awesome in A/W imo.