I own both and like both (modded - dislike the HE-6's etched treble stock). HE-6 needs the right amplification and the right mods to make it agreeable, but won't scale like the HD800 in terms of resolving ability no matter what you do to it. That said, with the right pieces, the HE-6 can ofter a visceral listening experience that I have yet to hear from the HD800. The degree to which that matters will depend on the listener, their musical preferences, etc. I paid about $900 for my HE-6, which was sold as an "open box" despite looking brand new. I felt it was a fair price relative to other planars.