for really loud hubs, industry9 are the ones to have, got plenty of comments and kept the group awake at night on pbp, and pedestrians sometimes jump being spooked when i start coasting.. a big hollow in carbon rims amplify their loudness too.
overall i prefer quiet(er) freehubs, it's only a shame that they don't engage as well as the loud(er) ones, e.g. shimano, formula/quando, older mavic - all skip occasionally.