Another thought on ear protection (over ear)
http://www.pro-ears.com/shootingsportshearingprotection.htm
I've bought a pair of the Dimension 2's and love them. I'll use them when I'm out cutting the fields, or working on the basement I'm finishing. In fact, the wife will be gone and I'll have the Pro Ears on so I'll have to CRANK my single LaScala downstairs so it will be a nice listneing level. Wife then comes home, doesn't see me with the hearing protection on and just goes beserk with how loud it is... 
I also KEPT them on one day when I KNEW the system upstairs was cranking (before I wired up a LaScala downstairs, I simply turned the upstairs Jubilees up MORE)
Anyways, we had a cd change and the NEW cd was very compressed or something... all I know is it was freaking thundering loud so I kept them on to go turn it down. Upon getting there, the needles on my McIntosh MC-2102 (100x2) were PEGGED and not moving until I turned it down. I wasn't abusing it like that earlier, just a change of CD's and their signal strength (yeah right!!)
The Pro Ears, when I'm out cutting the fields, can be hooked to a cd player or something and allow that to pass through.
The thing that to me is most intersting about them, they have some kind of little microphone inside them. If you have JUST them on your head (no cd hooked up) and have them turned on, they will let some sound through. Their window of allowance is near the vocal range. Truth be told, my wife has come up to me while I was sitting on my (operating) industrial backhoe. She admonished me to turn it OFF so "I could hear her", or to at least take the headphones OFF to hear her... what she didn't grasp is, I could hear her BETTER with them ON than with them off (backhoe running).
Really nice. I'm not affiliated with them. Bought these many years ago and once I've had them on, find them very comfortable and easy for me to wear for hours.
Downside... not cheap.
Professor Thump told me to take a Custom 3 and stick it in my ear. I did...and it sounded great!!!