Might have to ask if I can get one on loan. The DX100 (ignoring my frustration with the UI) is a very good all-in-one unit, so if they have done better with the DX90 sonically, but in a smaller package, that I would be interested in trying.
So do I. I also believe my wallet would take a bottle of sleeping pills, slash its wrists and jump off the building if I had one here. However, I had planned to borrow one for review. Let me follow that up.*
Yup, I was thinking along these lines, especially because the Pico Power is very low distortion. I might go that way actually: Pico Power for the IEMs and Phoenix for the full-sized headphones. However, I'm not quite convinced it will help a great deal. The Pico Power did help with the modded AK100 when using the 1plus2s on very complex music, but it wasn't $500 worth of benefit. It almost certainly didn't make any difference with any of my IEMs when using the AK240. I'll try with the Sony though.
*There goes my camera lens budget for the next year....