The soundstage depth has nothing to do with it sounding congested. If too many sounds played at once within the midrange, the headphone became congested. My SR225 and SR325 both have a literally flat soundstage (absolute zero depth), yet they never become congested even with very complex passages. I heard the on-ear DNA at Office Depot before as well, same result.
Edited by Mad Max - 2/17/14 at 6:03pm