Headsets
I'm with Pretzal. Get the DC 13.4 and instal the ANR kit from Headsets Incorpoated. I did this a year ago and no troubles. The ANR system is like a miracle.
When I first considered ANR I was a bit worried that it would cancel out sounds that I really wanted to hear such as the stall warning. But on the contrary....the ANR only takes out the low frequency noise (engine) which makes it so much easier to hear all the higher frequency sounds (such as speech). For anyone who's losing a bit of hearing with age I can't think of a better investment you could make.