This is why old-school anime is better. While quite busty, even Cutey Honey and Fujiko Mine were never what I considered excessively endowed (although some latter incarnations got mighty close).
Anyways, Dragonaut was produced by Gonzo who have a predilection toward making shows having female characters with either very small breasts or giant ones. Examples: Burst Angel, Gravion (series), Witchblade, and Gantz. OK, I'm exaggerating about the predilection bit.
Well, at least if you want to practically ensure you don't have a bunch of giant boobs in your anime, then watch moe stuff. But that's a whole different can of worms.