thanks for this. side-note about the TMJ: something that really helps is a (chinese) massage of the jaws. when I bought my first IEMs, my TMJ got worse (there may not have been any causal connection but it was the same time), but going to customs and getting massages both helped.
In my big "Flagship Custom IEM" review which included the UE11Pro I found my iPod Video 5.5G had the best synergy with UE11Pro. The bass was well controlled and not over-the-top like with my iPhone 3GS or several different amps. That was summer 2009 but I haven't gone out and tried all my new gear with them because I was spending more time with the JH13Pro and ES5. At some point I can revisit amp synergy with UE11Pro, but for now take a look at my old review.
I reported a while back that I had some background hiss with my Amphora, which uses the same circuit in the headphone amp. The ES3X hiss the most with it, and the JH13Pro the least, while the UE11Pro and ES5 are in the middle. So only the hiss with ES3X is really intrusive during quiet passages - but a Westone volume attenuator with very slightly reduced volume kills the hiss completely, although it hurts the transparency slightly.
I have trouble chewing food while wearing my custom IEM because my TMJ makes clicking and popping noises when I bite down, and sometimes the IEM make it worse. The Westone are more comfortable but no better with the clicking.
Edited by melomaniac - 3/19/11 at 2:10pm