As an aside, the SE530s did come today. I did cursory listen through my 160GB iPod Classic and then through the headphone out on my Alesis Masterlink (of a live performance I recorded this past Sunday). First off, they don't seal correctly, and I know I need to fix that - there's lots of tips in the bag! Second, they're bigger than I thought, but that's just an observation, not an issue. They are beautifully packaged and made.
The sound was not quite what I expected, from I'd read, anyway. They certainly are considerably more efficient than my Ety ER-4S, and were quite loud right out of the gate. I had to turn the iPod way down! But, they were not as smooth as I'd read, not were they as euphonic. I noticed some white noise from the iPod between music passages - something I'd never heard with Ety's. I also noticed some upper midrange harshness from the iPod, but that was not present from the Masterlink, so I doubt it was the IEM. The midrange is quite forward; the SE530 does not sound reticent at all! Compared to the Ety's it is really in your face. I didn't play any really bass heavy music, but what I did play told me that the SE530 has some upper bass warmth, but not really any more bass weight than the Ety's do. I suspect an amp might change that - as it would with the Ety's.
So - a quickie listen, and, my take? The Ety's are, to me, more accurate, analytical if you will, and the SE530 is more efficient and "bigger" sounding. I'm looking forward to getting to know them!