At the risk of outing myself as an ignoramus: Who or what are Astell and Kern who lend their names to this? The presentations give the impression that I should go ooh and aah about Astell & Kern working on this, but I have never heard about them. Googling this name combination only leads me to pages about this DAP, and astellnkern.com belongs to Iriver.
Are these some renowned yet secretive entities? Or did Iriver come up with this double name, possibly to make it look like other expensive European brands with some heritage, i.e. Bang & Olufsen, Jaeger-LeCoultre, and similar? If it is the latter, then I must admit I would find that a bit lame (although at least they picked real names, unlike atrocities such as Häagen-Dasz or Krug Baümen).