I am no muff expert by any means. I have been really impressed with these though...
http://www.midwayusa.com/viewproduct...m_campaign=655
Great protection for your ears, while still able to hear the softest sounds around you. They have an auto turn off feature just in case you forget to turn them off, and you can even plug an MP3 player into them. For the money, they are going to be hard to beat.