Searched for this topic, and hate to drag an old thread, but I'm finding that as I age, it's becoming more and more important to protect my hearing. Too many places are just ridiculously loud these days.
Anyway, on the Ety site, I found this new gizmo to be quite interesting: https://www.etymotic.com/consumer/hearing-protection/mp915.html
My guess is that their second generation attempt at this particular product/technology will be the time to jump in, whenever that might be. But there is a lot of good feedback so I'm tempted... and I've spent $299 more foolishly.
Could just order several of the ER-20 XS. Last time (several years ago now), I ordered 5 sets of the ER-20, and think I gave most of them away. Where the last pair or two are is anyone's guess...