I started off on a closed/fixed lid, but moved to a flip-up when I started doing on-road/off-road rides. The flip-ups are great for getting more air flow, taking a drink without having to remove the lid, etc - but are typically louder than fixed lids.Thanks for the links. Now I’m not sure what style I want anymore.
It's not uncommon to have several helmets, plus they are supposed to be replaced every 5 years or so as the protective materials compress, break-down, get old... imo - an old helmet (no crashes) is still better than no helmet.