I hadn't considered how much noise a singer puts out nor how it works on LE enemies. I'm considering a respec into something else. Maybe Berserk? I don't have a zerker yet.
I think you're fine to stay a singer. The noise doesn't really bother me (though I grunt every time I attack as well, so...) and I know some play w/o game volume.
The LE stuff is only occasionally annoying, and shouldn't happen that much unless we run into more beetles. If you're interested, here's a couple of posts about it:
Kitteh losing a HC singer to beetles
Fruit's conjecture about why