Thanks for the reply. Sorry for my mistake in the original post - I meant that I own the SR125i.
As for the sound signature - neutral, almost monitor quality I would say but not clinical. It may err lightly on the side of warmth. Also, I may consider tube amplification if the earphone itself is a bit dry in the sound. I am not a bass head and will rarely listen to bass heavy material - I also get the feeling when listening to music that bass heaviness makes some phones sound sluggish.
Many years ago I had the chance of listening to an old pair of STAX and was amazed with the efortlessness of their sound. It was a special bi-aural recording demo disk though so I am not sure how representative it was of real usage. If I could summarize my quest it is having sound that is effortless from the earphones - a sound I could critically listen to when I want to or just let it stream music while working.
I have read the some of the thread you posted - thanks for the information. I guess I should just go and listen but I have no place to listen to the Audeze 2 and the more expensive phones in.
While there is no substitute for hearing a can yourself, both the HE 500 and LCD-2 are the objective of many quality reviews. They should give you a sense of each and the differences between them. If it's any help, both are outstanding cans and have high resale values.