Thx all, I gave the PF2 a try but they doesn't work for me so I've sent them back and ordered a pair of A20 without BT because it's not allowed.
In case someone is interested, the noise reduction in piston aircraft works well without any kind pf problem and the comm are crisp clear. For sure they are better than a pair of passive headset and obviously a step under the A20 but this is due to the fact that they are in ear and not due to the quality itself of electric noise reduction of the headset.