Hey all, I recently found some impressive electronic ear protection options from SportEar (http://www.sportear.com/
Endorsed by Tom Knapp over at Benelli. 24dB NRR in-the-ear, custom fitted and tuned based on your individual hearing (they test you first). The units can amplify the sounds you want to hear (like a deer walking through leaves) while still attenuating your muzzle blast, and have volume controls for use in the field. Really impressive bit of kit.
Downside? They're gonna cost you a few shiny silver dollars. From $700 on up to $3,000+. Check please!