Well, at least I don't see much of a problem with cycling clothes, except of course how it will show what I have. And of course I'm a bit smaller than you in the breast department, so it's easier to get away without a bra. As I said, the main issue is discomfort caused by my shirts, followed by long term consideration (future sagging, although it's less of a problem with small-ish breasts).
Regarding bra styles, I assume strapless will be better out of a hiding standpoint?