I guess I'm the only one who uses the clarity aloft and the lightspeed mach one..

The cub out in the front yard has CA's in it. They're wonderful. They're TSO'ed.

My flight bag has a pair of Mach Ones in it. My regional specifies TSO'ed headsets, I suspect mainly because of the rash of amateur electrical engineers building headsets out of things that weren't designed to be aviation headsets. As far as mine.. they don't matter, I'm furloughed.

Anyway, I LOVE the lightspeeds, right now I'm using clarity aloft earpieces. Never bothered with custom molds, the foam stuff seems to work fine.

Go with what you can afford.. and try before you buy!