I received the HE-400s. Haven't tried them yet, though.
EDIT 1:Listened to King Crimson's Starless. I shed a tear. Although, the mids are a little less than spectacular.
EDIT 2: Out of curiosity, will these demo sets be put for sale at a discounted price after this is over?
justin has an open box/returned section on his site. prices are pretty good.