Hi
Just a couple of little things. I bought a set of cheaper headsets. One broke on short finals once, requiring 2 stitches in my thick head. Also if buying second hand know what you are buying. There are Military spec DC's for sale on E-bay at present. If you have a civvy radio fit they will not work!!
Also try before you buy. I love my Peltors (7006) and DC's 10-30,10-80. At work I Use Sennheiser ANR's which are OK but they seem a little unsturdy. I also use DC13.4's which I as a personal choice will replace my own headsets when the time comes.
regards
Wide