I agree with FJ's points, especially on design (m9xx's uncluttered look is downright awesome), portability (being able to power it with battery pack on the go is a killer function), reputable build quality and support. The way they implemented the various settings/functions, everything really into one knob is ingenious. And yes, having a knob for volume beats stepped-up control every day in my book too, can't wait to receive it!
Also wanted to comment on something about DSD-capable DACs that hasn't been stressed (or stressed enough). The fact that resolving 16-bit/44k, CD quality files thru DAC is a level above simply playing the files thru the phono plug on your device or computer speakers. But streaming DSD (and equivalent sampling rate), and thru quality DAC? This takes the music resolution, clarity and detail, the whole experience really to a level altogether different - so different, it is a completely new ballgame! The point is, M9XX like many of the new breed of DACs is capable of streaming DSD, yet most nobody seems aware of the experience this feature can open for fans of the music. My jaw drops again, and again, and again when reading that people use their DACs to play MP3 files from their computer or device, seemingly unaware of what's really sitting at their fingertips.
The first time I heard DSDS128 record it felt as if a veil covering my head for my entire life has been lifted, a blessing! But I instantly realized that in a way it is a curse too, for I knew I reached a point of no return. Now I don't want to listen to music with lesser resolution levels thru headphones anymore, the kick from DSD quality is that great. That comes with downside for me though, for I have accrued 1,200-strong CD collection which now with few exceptions I no longer have the desire to reach for :( ... maybe I should have stayed ignorant, maybe ... naaah, I'll just bite the bullet and start accruing SACDs (and hone my negotiation skills so my wife don't divorce me :):):)