If you want quiet, consider the Airman 850. Which Embraer aircraft is it? If it is one of the ERJs than I HIGHLY recommend the 850. It has active noise cancellation with no batteries (uses Mic bias), adjustable mic gain and high/low volume select to augment your audio panel, is within your required spec, and is not much more than the 750 model.
Telex Airman 850 Lightweight, FAA TSO approved, ANR headset, no batteries or panel power