I've just posted a similair topic in private flying. I'm about half way thro my PPL training, with plans to go on to commercial training.
I went to my local shop and tried a load on. I really wasn't impressed with DCs. They weren't very comfortable and had very high cup pressure. The bose-x are gorgeous, really light and comfortable. Pretty much every review of them I've read says they are the best ANR headsets you can buy. Slight problem is there £750. My plan is to get them in the US were they are quite abit cheaper.
This a good choice? Also, what type of mic is needed electret or dynamic?