I have had and used the bose low impedance for 5 years on the north sea and never had a problem with it. I have tried and tested the ear plugs with both bose and peltor and found them a complete waste of time, uncomfortable and make the radios even more difficult to make out. Just look on the thread about ANR headsets, there has been a good argument running on there for a while. It is true that when the batteries fail the bose gets a bit noisey usually just as you are turning short finals to the rig!!! but with a spare battery in hand it is not a real problem. Personally i have found the Bose very comfortable, fairley reliable and make working the north sea a bit more bearable.........if you know someone that has a set see if they will let you try it for a couple of flights....thats how i ended up buying a set.
T4