"Still looking for a helmet that has better soundproofing than my regular Peltor headset, tried Gallet(crappy) and Alpha Eagle(ok, but not better than my headset). Wish the manufacturers would put some more effort into the hearing protection.."
Have you tried CEPs? I reccomend them 100% and everyone that I know that uses them does too.
http://www.cep-usa.com/
Everyone I know that uses them has either a HGU or SPH helmet, though I don't see why they couldn't be put into any helmet or headset. The website says they have kits for Alpha and Gallet helmets already.
-Mike