A little bit of a narrative:
I just got into IEM's about a month ago. I got the X10's, then got custom tips, but was listening from the headphone jack of a Creative Zen. Thought that was good.
Tonight, I went down to my basement and got my headphone amp. It's a studio amp called a Samson Q5. So, I hooked up the X10's to the Q5....
Holy crap, I think I had an eargasm.
Why didn't anybody tell me that using a great headphone amp would make the X10's sound that much better? I spent the last 3 hours listening in amazement, starting with Watermelon by DJ Kewlaid, then Sirens of the Sea by Oceanlab, and finished up with the remastered Led Zeppelin album Mothership. The air and soundstage and depth and detail....
The moral of the story is, if you have X10's and you haven't tried them with a really good amp, I suggest adding that to your list of things to do.
Now my dilemma is, do I start taking my studio amp with me to work and back, or do I start the search for a kickass portable amp? Wrong forum for that question, but the search will begin. I can't really afford one till the end of the month, but research is good.