I was thinking Apogee One or the Duet. Your thoughts or experience on which is the BEST sounding and most powerful USB powered DAC/Amp combo?
The Duet isn't USB-powered, it uses Firewire, which has a higher output. The Duet has a quite reasonable headphone amp built in, but nothing particularly special.
I'm going to throw it out there. How about the Fiio E10?
Ooh, old thread bump. There's now a USB Duet II.
And the Ibasso D7 too.