The other one I would have gone for was a light grey cord suit with a dark blue shirt, but the suit needs cleaning and alteration before I unleash it on the forum (if I ever do - it may just get cleaned and go straight to the Salvation Army along with the brown shirt)...
I'm still not convinced that dark shirts can never work as part of a suit ensemble - though I agree that as CBD it's out - so I would like to see those who do think it can work here, post some examples at some point. Maybe in a different thread.
one can't answer the question of whether dark shirts work in isolation - it is as much a function of established conventions around what dark ensembles ARE used for, since we view anything through the lens of cultural conditioning. so as long as game show hosts and night club bouncers wear dark ensembles, it'll be tough to wear one without immediately being associated with them. if, hypothetically, they were to switch to CBD as their uniform, all of a sudden the apparent appropriateness and inevitability of CBD as CBD would be in question.