I've tried gun muffs with in-ear phones. Very painful after awhile.
The Direct Sound Extreme Isolation Headphones are very comfortable. The drivers were fairly flat IMHO. Which is great for me. I'm not using them for mixing. I'm only using them when I'm playing to a click.
Thanks for the tip James. I want at least one more pair so I don't have to share mine with the other drummers that come over to record.