I loved the chambered until I did a high flow DP, then I needed to put a resonator back in because the raspy ricer sound.

Chambered with stock DP without resonator is good
chambered with high flow DP without resonator is bad
Chambered with high flow DP with resonator\glasspack is good
Turbo muffs really don't matter, but they do not have as much sound, but no drone.

Sound is subjective. I can try and make another video of my car tomorrow with current setup and no wind if you like.