Since I'm local to you, let me know if I can be of any assistance in stirring up another batch of these wonders.
Also, after a bit of a sabbatical from this thread - due to the sale of my HE-400s, I went through 3 other models from HifiMan - The HE-5LE, the HE-4 and the HE-500. All three were great, great headphones that excelled in various areas. However, what occured to me is that I missed some of that unique slam that the HE-400 offered. So, with the HE-5LE, HE-4 and HE-500 models being sold off, I've made it back to the HE-400.
Immediately, I was loving the bass that they provided. Though, as the downside, I also experienced the sibilants in the female vocals that pushed me away from the HE-400s before. I don't currently have a headphone amp connected to my computer, so I can't use the EQ programs that work with Foobar and WinAmp. However, I'm running both wired and wireless versions of the Squeezebox player in my home. The Squeezebox player has an EQ plug-in that I can use. This will allow me to define anywhere from a few bands up to quite a few bands for sound adjustments. Needless to say, I'll be focusing a bit on taming some of the frequencies once again to my liking.