I've since reworked my iTunes balanced EQ to (sorta) match the Olive-Welti target curve. It definitely does 'lift' the HE-400 out of its laxness, in a sense-- and without adding too much tinny quality that's associated with too much 2khz (*cough* re-400 *cough*) The only downside to this is the transition from 2-4 and then 4-8khz isn't as smooth as it could be.
Edit: btw the HE-400 aren't too resonant at all. Have a look at Purrin's CSDs. About the only thing they really display is a characteristic 'ortho wall' In the upper mids.
That's just about exactly the same as how I EQ mine. Sometimes I'll boost the bass up 3 or 4dB when I'm feeling my basshead side but other than that yours is pretty much spot on to what mine looks like.