I bought a bose a few months back now, has worked great. The only problem ive had was one day i was in the right seat and it made some wierd noise occasionally, as if the noise canceling turned off then on quickly, mite be that hooonk noise you are talking about.
A good thing I've noticed is if you turn the headset volume to minimum (and turn the panel volume up) it gets rid of that annoying background noise you get from the beacon or strobes.