If you're really serious about the best hearing protection, you might want to check out some of the electronic hearing muffs. You can even turn up the gain to aid your hearing but the muffs will react to gun fire to filter out the report. They're expensive ~$135. You might want to check out Dillon.
http://dillonprecision.com/template/p.cfm?maj=7&min=0&dyn=1&
You'll have to cut and paste, I don't do links.
I heard they were very good, if somewhat heavy.