I am now wearing Pro Ears Ultra passives NRR 33. I got them to see if the brand was comfortable on my head before spending the money on their electronics to replace my dear departed old Peltors. They are comfortable but I just haven't gotten around to buying the corresponding electronics.
My spares are Peltor Ultimate 10 NRR 30 and a supply of foam plugs.
I have had the silicone molded to fit plugs and they were neither quiet nor comfortable. Maybe the ones done by an audiologist instead of a gun dealer would do better, but they are very expensive.