Thanks guys. I'm under the impression that the upper mids and lower treble are more restrained than the OG, but what I've read concerning brightness and fatigue refers to the upper treble. I prefer a very mild darkness in the presence region, not intensely detail driven, but still detailed enough to hear most everything that the track has to offer. Right now I'm trying to decide between this and the Radiance. I've been through enough cans, now I'm after both a closed and open end game. These headphones are right at the top of my spending allowance.