@ Sachu - 2 CJ tracks. "Mining for Gold" and "Walking After Midnight". I chose those because they were done in an open church (I say this relating to dBel84's "Cara Dillon sounds like it would be best played to a large crowd over a PA system". )
Also, Alison Krauss' and Union Station album can be sharp at times, but on all of my headphones.
dBel84 sent me a Alison Krauss track last night..some sharpness but not out of the ordinary.
Anyways, what you say is true though, THe HE-5 is a really nice headphone..Not sure about the HE-5+EF5 combo though. An M3, CK2III, B22, SOHA2, etc would all fair much better i would suspect. Hopefully i'll get to listen to the EF-5 sometime..but my recommendation thus far will be for any of the amps I mentioned above.