Live sound engineer here. Im at 5 concerts a week. My best recommendation is Sensaphonics with a -9~ db plug. They are molded. You go to a ear doctor and the create a mold of your ear which you then send to the company. My doc did it for free since Im in the industry and threw in an ear test as well which I loved. These are the plugs most professional touring guys have hanging from their belts.

The cheap option I would recommend is the Etymotic research ones. Pretty good response off those. I keep a pair in my work case as back up.