I'm trying to cull my rapidly expanding collection and I've decided either the T90, the HE-400, or the TH600 needs to go. In what may come as a surprise to many, I'm leaning towards selling the TH600. I feel like the HE-400 comes close to it in terms of bass impact and excitement - and I could get much more for the TH600. Furthermore, vocals and some mids on the TH600 sound too distant to me. Neither the TH600 nor the HE-400 can match the highs or clarity of the T90, though. Thoughts?