Regardless of the set you finally choose, please, please get Active Noise Reduction (ANR).
You only get issued ONE set of ears, and your hearing degrades directly due to the amount of noise that they are subjected to... I've seen a mid 50's pilots lose his medical due to loss of hearing, and plenty of guys who couldn't hold a conversation because they couldn't hear you...
DON'T let this happen to your young bullet-proof 30 year old As*
... just sayin
FR