That's almost the opposite of my experience, I found the HE60 soundstage to be huge and open. It didn't have any of those pseudo room effects that many headphones seem to exhibit that force a soundstage on the listener. In my opinion those effects are not the same thing as true soundstage and are really an artificial coloration. If I wanted that feeling I'd run the sound through a spatializer.
Oh, and Matt, the HE60 is diffuse-field equalized, just like the Omega 2 is.