175 isn't as quiet as the Airbus, but it's close. Qc15's and the uflymic is my recommendation. Light, packs easy, and doesn't clamp. Best part is its 700$ cheaper than the A20. If you buy used its even better. I got my headset for 80$ off eBay, and the mic was new. So 330$ I think was my total investment. Plus you can use the qc15's in something other than aviation. Win win