Yeah actually I'm thinking about the same thing too,

I was very happy with my ksc75. Then maybe I treated it too rough, then the bass magic kinda like dissappeared. ( dunno if something's wrong)

Then I got a chance to test an IEM, I listened to jazz or lounge, the complex mids and highs are much better than the original ksc75.

So i'm still thinking if i should get an earphone or IEM( but the soundstage, if compared to ksc75... is much smaller). or to get PcWork Recabled koss ksc75. I listened to yeah_guyz's before, and I somehow "woah" But i haven't tried it on my music before.

Any suggestions? Thanks guys.