Guys, I would highly recommend the use of Peltor Tac 6 ear muffs.
There are two basic requirements when it comes to a ear muff (other than ear protection) if you are going to use it at ALL TIMES. First, the ear muffs must be thin enough to not contact the gun stock; second, it must not over amplify the noise to a point to where you are being over whelmed with background noise.
The Peltor Tac 6's do a great job of everything. At $69, they are a deal of a life time.
Lots of guys can't get used to wearing something on their head, especially if they are hot natured, but the alternative is simply to ruin your hearing.
A second choice is the Walker Game ears, they are really great, but cost much more. They usually run $125 or so each so you are talking $250 for a pair.
Electronic ear muffs also allow you to hear doves coming in, they make this little peeping sound as they fly, and if you are a crow hunter, you will hear the crows talking to themselves as they fly in to your call.
Sonics are terrible.
I currently have 4 different kinds of electronic ear muffs. The large ones that hit the gun never get used and I will not resale them for the same reason.