The Hearos earplugs I'm using muffle the sound, so I don't use them often. I'm thinking of buying either the Westone TRU Universal WM25 Full Frequency Earplugs or the Etymotic Research ER-20XS High Fidelity Earplugs. Both claim to have balanced sound, but the Westones are nearly twice the price. They look pretty similar to each other. Does anyone have experience with both or comments on either?