After re-reading David Mahler's review, I think I'll just go with the $375 deal since there seems to have been revisions to the HE400's, and it wouldn't be clear which version I would be getting if I purchased them used. I appreciate your help + the link, though.
In regards to amp/DAC'ing...is the E17 fine for these? I also plan on rockbox'ing my iPod...and watched a head-fi video where Jude mentioned that rockboxed iPods can't use amp/DACs, albeit a relatively old video. Is this still the case? And if so...is rockbox'ing just a cheaper alternative to amp/DACs or does it hinder optimal SQ since a physical amp/DAC might be better?
Perhaps I should take this question elsewhere lol, but you guys are pretty chill so I thought it would be worth asking