The HE 400 are definitely tempting at that price. I listen to a lot of ambient, classical, minimal techno and avant grade stuff (Actress, Sean McCann, Oval, Ryoji Ikeda, Tim Hecker etc). Bass isn't hugely important to me. Would those still be appropriate? I also listen to a lot of pop, and a little metal, rap and jazz. I don't really listen to much dubstep or dance-centric music.
If I get them I'll probably get the Schiit stack as well.
They are a great all arounder and would fit your needs well.
Mainly puts a bit more emphasis on upper midrange and has smoother treble response. All round smoother response though.
Welp, order placed.