UPDATE
Since this post, I've had the Klipsch X10, and the Etymotic HF5. The X10 is a very nice IEM, but the sound signature is too much like the SE530 (heavily detailed, good bass response, but the details a little rolled off. The X10 has about 30 hours of burn-in from me, but I'm not sure how much was done from the previous owner. The previous owner claims he never used them, even though he opened the box. Who Knows.
The HF5 has more clarity than the X10, and the bass response was not as powerful, but the details were not clear enough for me. The details were a pinch still too rolled for me. I've only burned in about 8 hours, but I'm not sure what kind of improvement to really expect. There is something missing from the hf5. Maybe it is due to the bass, I'm not sure, but there's some kind of weight missing. The sound doesn't seem full. And the slightly rolled off detail isn't enough for me to truly enjoy them.
I'm coming off the Grado sound, and I would like something that comes close to that clarity. I'm not sure how much more clear I can get in IEMs while still getting adequate bass. To me, clarity = realism. I want clarity with full bodied bass. But on the same token, I want a supremely comfortable fit. I just do'nt want something as big as the SE530 or Westone 3, protruding from my ears, making it a difficult project to put them on every time, and wrapping cables around my ears.
I'm now skeptical about the X5, because they say it is similar to the ER4p etymotic. I've heard the X5's detail doesn't quite match ER4p, and that it's detail is a bit rolled off as well. If that's the case, the X5 will not be for me. I'm considering the ER4p, but we'll see.