I've got an HE.. LFF's review on HF was spot on.. it's a picky bastard.. but pretty damn good, still. A/Bing with the HD800, I can see where (in places) the 002w-HE can comes sniffin' around. One thing I noticed with the 003/002w was that the driver needs to be positioned fairly close to the ears (compress the pads) for a more even (midrange) response.
I've been talking with an FA rep.. they'll be revamping the HE line (among other things, we can expect better components in the APC-02 filter). FA's developing a hybrid driver IEM, too.. and are in the early stages of co-developing a planar (!).