Just a little update: I really enjoyed listening to the Amber DAC this weekend. It does high res really nicely, and beautiful recordings sound simply beautiful. Lesser recordings, like MP3 played on Pandora via the Roku, are pleasant and well-defined, but don't hold a candle to better resolution sources. The same goes for HD TV broadcasts: Great resolution movies sound terrific, but lesser fare can be on the bright -- and sometimes -- harsh side.
That's not unusual for high quality DACs. And, mark my words, this is a wonderful DAC!
I will be working on a formal report, and will be scheduling the pick up and comparison of a couple other DACs with it very soon.
Cheers,
Juan