Agree 100%. I just got the HD58X and they are much more fun compare to the SHP9500:
Bass: Much better on the HD58X. The SHP9500 has good bass but not has "deep" has the HD58X.
Mids: Much better on the HD58X. The SHP9500 sounds distant.
Highs: More pronounced on the SHP9500 however with "busy" music they can be fitigging.
The overall sound stage is better on the HD58X.